<h1 id="awesome-c-awesome-track-awesome-list">Awesome C++ <a href="https://awesome.re"><img src="https://awesome.re/badge.svg" alt="Awesome" /></a> <a href="https://www.trackawesomelist.com/fffaraz/awesome-cpp/"><img src="https://www.trackawesomelist.com/badge.svg" alt="Track Awesome List" /></a></h1>
<p>A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny things. Inspired by awesome-… stuff.</p>
<ul>
<li><a href="#awesome-cpp">Awesome C++</a>
<ul>
<li><a href="#standard-libraries">Standard Libraries</a></li>
<li><a href="#frameworks">Frameworks</a></li>
<li><a href="#artificial-intelligence">Artificial Intelligence</a></li>
<li><a href="#asynchronous-event-loop">Asynchronous Event Loop</a></li>
<li><a href="#audio">Audio</a></li>
<li><a href="#biology">Biology</a></li>
<li><a href="#bittorrent">BitTorrent</a></li>
<li><a href="#chemistry">Chemistry</a></li>
<li><a href="#cli">CLI</a></li>
<li><a href="#compression">Compression</a></li>
<li><a href="#concurrency">Concurrency</a></li>
<li><a href="#configuration">Configuration</a></li>
<li><a href="#containers">Containers</a></li>
<li><a href="#cryptography">Cryptography</a></li>
<li><a href="#csv">CSV</a></li>
<li><a href="#database">Database</a></li>
<li><a href="#data-visualization">Data visualization</a></li>
<li><a href="#debug">Debug</a></li>
<li><a href="#font">Font</a></li>
<li><a href="#game-engine">Game Engine</a></li>
<li><a href="#gui">GUI</a></li>
<li><a href="#graphics">Graphics</a></li>
<li><a href="#image-processing">Image Processing</a></li>
<li><a href="#internationalization">Internationalization</a></li>
<li><a href="#inter-process-communication">Inter-process communication</a></li>
<li><a href="#json">JSON</a></li>
<li><a href="#logging">Logging</a></li>
<li><a href="#machine-learning">Machine Learning</a></li>
<li><a href="#math">Math</a></li>
<li><a href="#memory-allocation">Memory Allocation</a></li>
<li><a href="#multimedia">Multimedia</a></li>
<li><a href="#networking">Networking</a></li>
<li><a href="#pdf">PDF</a></li>
<li><a href="#physics">Physics</a></li>
<li><a href="#reflection">Reflection</a></li>
<li><a href="#regular-expression">Regular Expression</a></li>
<li><a href="#robotics">Robotics</a></li>
<li><a href="#scientific-computing">Scientific Computing</a></li>
<li><a href="#scripting">Scripting</a></li>
<li><a href="#serialization">Serialization</a></li>
<li><a href="#sorting">Sorting</a></li>
<li><a href="#video">Video</a></li>
<li><a href="#virtual-machines">Virtual Machines</a></li>
<li><a href="#web-application-framework">Web Application Framework</a></li>
<li><a href="#xml">XML</a></li>
<li><a href="#yaml">Yaml</a></li>
<li><a href="#miscellaneous">Miscellaneous</a></li>
</ul></li>
<li><a href="#software">Software</a>
<ul>
<li><a href="#compiler">Compiler</a></li>
<li><a href="#online-compiler">Online Compiler</a></li>
<li><a href="#debugger">Debugger</a></li>
<li><a href="#integrated-development-environment">Integrated Development Environment</a></li>
<li><a href="#build-systems">Build Systems</a></li>
<li><a href="#static-code-analysis">Static Code Analysis</a></li>
<li><a href="#coding-style-tools">Coding Style Tools</a></li>
</ul></li>
<li><a href="#resources">Resources</a>
<ul>
<li><a href="#api-design">API Design</a></li>
<li><a href="#articles">Articles</a></li>
<li><a href="#books">Books</a></li>
<li><a href="#coding-style">Coding Style</a></li>
<li><a href="#podcasts">Podcasts</a></li>
<li><a href="#talks">Talks</a></li>
<li><a href="#videos">Videos</a></li>
<li><a href="#websites">Websites</a></li>
</ul></li>
<li><a href="#other-awesome-lists">Other Awesome Lists</a></li>
<li><a href="#contributing">Contributing</a></li>
</ul>
<h2 id="standard-libraries">Standard Libraries</h2>
<p><em>C++ Standard Library - including STL Containers, STL Algorithm, STL Functional, etc.</em></p>
<ul>
<li><a href="https://en.wikipedia.org/wiki/C%2B%2B_Standard_Library">C++ Standard Library</a> - A collection of classes and functions, which are written in the core language and part of the C++ ISO Standard itself.</li>
<li><a href="https://en.wikipedia.org/wiki/Standard_Template_Library">Standard Template Library</a> - The Standard Template Library (STL).</li>
<li><a href="https://en.wikipedia.org/wiki/C_POSIX_library">C POSIX library</a> - A specification of a C standard library for POSIX systems.</li>
<li><a href="https://github.com/cplusplus">ISO C++ Standards Committee</a> - ISO/IEC JTC1/SC22/WG21 - The C++ Standards Committee. <a href="http://www.open-std.org/JTC1/SC22/WG21/">website</a></li>
<li><a href="https://www.gnu.org/software/libc/manual">The GNU C Library</a> - The purpose of this manual is to tell you how to use the facilities of the GNU C Library.</li>
</ul>
<h2 id="frameworks">Frameworks</h2>
<p><em>C++ generic frameworks and libraries.</em></p>
<ul>
<li><a href="https://github.com/abseil/abseil-cpp">abseil-cpp</a> - Abseil C++ Common Libraries. [Apache2]</li>
<li><a href="http://stdcxx.apache.org/">Apache C++ Standard Library</a> - STDCXX, A collection of algorithms, containers, iterators, and other fundamental components. [retired] [Apache2]</li>
<li><a href="http://apr.apache.org/">APR</a> - Apache Portable Runtime. Another library of cross-platform utility functions. [Apache2]</li>
<li><a href="http://stlab.adobe.com/">ASL</a> - Adobe Source Libraries provides peer-reviewed and portable C++ source libraries. [MIT]</li>
<li><a href="https://github.com/boostorg">Boost</a> :zap: - A large collection of generic C++ libraries. [Boost] <a href="http://www.boost.org/">website</a></li>
<li><a href="https://github.com/bloomberg/bde">BDE</a> - The BDE Development Environment from Bloomberg Labs. [Apache2]</li>
<li><a href="https://github.com/sogou/workflow">C++ Workflow</a> - C++ Parallel Computing and Asynchronous Networking Engine. [Apache2]</li>
<li><a href="https://libcinder.org/">Cinder</a> - A community-developed, free and open source library for professional-quality creative coding. [BSD]</li>
<li><a href="https://github.com/idealvin/cocoyaxi">cocoyaxi</a> - A collection of C++ libraries, containing a go-style coroutine library, log, JSON, RPC framework and other base components. [MIT]</li>
<li><a href="http://ryan.gulix.cl/fossil.cgi/cxxomfort/">Cxxomfort</a> - A small, header-only library that backports various facilities from more recent C++ Standards to C++03 and later. [MIT]</li>
<li><a href="https://github.com/davisking/dlib">Dlib</a> :zap: - A toolkit for making real world machine learning and data analysis applications in C++ [Boost] <a href="http://dlib.net/">website</a></li>
<li><a href="https://github.com/electronicarts/EASTL">EASTL</a> - Electronic Arts Standard Template Library. [BSD]</li>
<li><a href="https://github.com/ETLCPP/etl">ETL</a> - Embedded Template Library. [MIT]</li>
<li><a href="https://github.com/sumeetchhetri/ffead-cpp">ffead-cpp</a> - Framework for Enterprise Application Development. [Apache2]</li>
<li><a href="https://github.com/facebook/folly">Folly</a> - An open-source C++ library developed and used at Facebook. [Apache2]</li>
<li><a href="https://github.com/Dobiasd/FunctionalPlus">FunctionalPlus</a> - Functional Programming Library for C++. Write concise and readable C++ code. [MIT]</li>
<li><a href="https://wiki.gnome.org/Projects/GLib">GLib</a> - GLib provides the core application building blocks for libraries and applications written in C. [LGPL]</li>
<li><a href="https://github.com/julianstorer/JUCE">JUCE</a> - An all-encompassing C++ class library for developing cross-platform software. [Core-Module: ISC, Rest: GPL2/GPL3/Commercial] <a href="http://www.juce.com/">website</a></li>
<li><a href="https://github.com/Kigs-framework/kigs">Kigs framework</a> - A free and open source C++ modular multi-purpose cross platform RAD framework. [MIT] <a href="https://kigs-framework.org/">website</a></li>
<li><a href="https://github.com/facebook/libphenom">libPhenom</a> - libPhenom is an eventing framework for building high performance and high scalability systems in C. [Apache2]</li>
<li><a href="https://github.com/sourcey/libsourcey">LibSourcey</a> - C++11 evented IO for real-time video streaming and high performance networking applications. [LGPL]</li>
<li><a href="https://github.com/koanlogic/libu">LibU</a> - A multiplatform utility library written in C. [BSD]</li>
<li><a href="http://loki-lib.sourceforge.net/">Loki</a> - A C++ library of designs, containing flexible implementations of common design patterns and idioms. [MIT]</li>
<li><a href="https://github.com/MariadeAnton/MiLi">MiLi</a> - Minimal headers-only C++ Library. [Boost]</li>
<li><a href="https://github.com/openframeworks/openFrameworks">OpenFrameworks</a> - A cross platform open source toolkit for creative coding in C++. [MIT] <a href="http://www.openframeworks.cc/">website</a></li>
<li><a href="https://www.qt.io/download-open-source/">Qt</a> :zap: - A cross-platform application and UI framework. [GPL/LGPL/Commercial]</li>
<li><a href="http://code.google.com/p/reason/">Reason</a> - A cross platform framework designed to bring the ease of use of Java, .Net, or Python to developers who require the performance and strength of C++. [GPL2]</li>
<li><a href="https://root.cern.ch/">ROOT</a> - A set of OO frameworks with all the functionality needed to handle and analyze large amounts of data in a very efficient way. Used at CERN. [LGPL]</li>
<li><a href="https://github.com/scylladb/seastar">Seastar</a> - An advanced, open-source C++ framework for high-performance server applications on modern hardware. [Apache-2.0 License] <a href="http://seastar.io/">seastar.io</a></li>
<li><a href="http://www.stlport.org/">STLport</a> - An exemplary version of STL. [Free]</li>
<li><a href="http://stxxl.sourceforge.net/">STXXL</a> - Standard Template Library for Extra Large Data Sets. [Boost]</li>
<li><a href="https://github.com/tboox/tbox">tbox</a> - A glib-like multi-platform c library. [Apache2] <a href="http://tboox.org/">website</a></li>
<li><a href="http://www.ultimatepp.org/">Ultimate++</a> - A C++ cross-platform rapid application development framework. [BSD]</li>
<li><a href="http://msharov.github.io/ustl/">uSTL</a> - The small STL library. [MIT]</li>
<li><a href="http://sourceforge.net/projects/wtl/">Windows Template Library</a> - A C++ library for developing Windows applications and UI components. [Public]</li>
<li><a href="https://github.com/jll63/yomm2">Yomm2</a> - Fast, Orthogonal, Open multi-methods. Supersedes <a href="https://github.com/jll63/yomm11">Yomm11</a> [Boost]</li>
</ul>
<h2 id="artificial-intelligence">Artificial Intelligence</h2>
<ul>
<li><a href="https://github.com/ANNetGPGPU/ANNetGPGPU">ANNetGPGPU</a> - A GPU (CUDA) based Artificial Neural Network library. [LGPL]</li>
<li><a href="https://github.com/aigamedev/btsk">btsk</a> - Game Behavior Tree Starter Kit. [zlib]</li>
<li><a href="http://eodev.sourceforge.net/">Evolving Objects</a> - A template-based, ANSI-C++ evolutionary computation library which helps you to write your own stochastic optimization algorithms insanely fast. [LGPL]</li>
<li><a href="https://github.com/Dobiasd/frugally-deep">frugally-deep</a> - Header-only library for using Keras models in C++. [MIT]</li>
<li><a href="https://github.com/codeplea/genann">Genann</a> - Simple neural network library in C. [zlib]</li>
<li><a href="https://github.com/apache/incubator-mxnet">MXNet</a> - Lightweight, Portable, Flexible Distributed/Mobile Deep Learning with Dynamic, Mutation-aware Dataflow Dep Scheduler; for Python, R, Julia, Scala, Go, Javascript and more <a href="https://mxnet.apache.org">website</a></li>
<li><a href="https://github.com/pytorch/pytorch">PyTorch</a> - Tensors and Dynamic neural networks in Python with strong GPU acceleration. <a href="https://pytorch.org">website</a></li>
<li><a href="https://github.com/flashlight/flashlight">flashlight</a> - Flashlight is a fast, flexible machine learning library written entirely in C++. [BSD]</li>
<li><a href="https://github.com/recastnavigation/recastnavigation">Recast/Detour</a> - (3D) Navigation mesh generator and pathfinder, mostly for games. [zlib]</li>
<li><a href="https://github.com/tensorflow/tensorflow">TensorFlow</a> - An open source software library for numerical computation using data flow graphs [Apache]</li>
<li><a href="https://github.com/oneapi-src/oneDNN">oneDNN</a> - An open-source cross-platform performance library for deep learning applications. [Apache] <a href="https://01.org/onednn">website</a></li>
<li><a href="https://github.com/Microsoft/CNTK">CNTK</a> - Microsoft Cognitive Toolkit (CNTK), an open source deep-learning toolkit. [Boost]</li>
<li><a href="https://github.com/tiny-dnn/tiny-dnn">tiny-dnn</a> - A header only, dependency-free deep learning framework in C++11. [BSD]</li>
<li><a href="https://github.com/Samsung/veles">Veles</a> - Distributed platform for rapid Deep learning application development. [Apache]</li>
<li><a href="https://github.com/kaldi-asr/kaldi">Kaldi</a> - Toolkit for speech recognition. [Apache]</li>
</ul>
<h2 id="asynchronous-event-loop">Asynchronous Event Loop</h2>
<ul>
<li><a href="https://github.com/chriskohlhoff/asio/">Asio</a> - A cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach. [Boost] <a href="http://think-async.com/">website</a></li>
<li><a href="http://think-async.com/">Boost.Asio</a> - A cross-platform C++ library for network and low-level I/O programming. [Boost]</li>
<li><a href="https://github.com/actor-framework/actor-framework">C++ Actor Framework</a> - An Open Source Implementation of the Actor Model in C++. [BSD-3-Clause] <a href="http://actor-framework.org/">website</a></li>
<li><a href="https://github.com/volt-software/ichor">Ichor</a> - An event queue which focuses on thread safety and provides dependency injection. [MIT]</li>
<li><a href="http://libev.schmorp.de/">libev</a> - A full-featured and high-performance event loop that is loosely modelled after libevent, but without its limitations and bugs. [BSD and GPL]</li>
<li><a href="http://libevent.org/">libevent</a> - An event notification library. [BSD]</li>
<li><a href="https://github.com/ithewei/libhv">libhv</a> - Cross-platform event loop library. [BSD]</li>
<li><a href="https://github.com/libuv/libuv">libuv</a> - Cross-platform asynchronous I/O. [BSD]</li>
<li><a href="https://github.com/xhawk18/promise-cpp">promise-cpp</a> - Header only library that implements Promise/A+ standard. [Anti-996]</li>
<li><a href="https://github.com/skypjack/uvw">uvw</a> - C++ wrapper for libuv. [MIT]</li>
</ul>
<h2 id="audio">Audio</h2>
<p><em>Audio, Sound, Music, Digitized Voice Libraries</em></p>
<ul>
<li><a href="https://github.com/adamstark/AudioFile">AudioFile</a> - A simple C++ library for reading and writing audio files. [GPL3]</li>
<li><a href="https://github.com/mackron/dr_libs">dr_libs</a> - Single file audio decoding libraries for C and C++. [Unlicense]</li>
<li><a href="http://www.fmod.org/">FMOD</a> - An easy to use crossplatform audio engine and audio content creation tool for games. [Free for non-commercial/Commercial]</li>
<li><a href="https://www.kfrlib.com/">KFR</a> - Fast, modern C++ DSP framework, FFT, FIR/IIR filters, Sample Rate Conversion. [GPL/Commercial]</li>
<li><a href="https://lame.sourceforge.io/using.php">LAME</a> - LAME is a high quality MPEG Audio Layer III (MP3) encoder. [LGPL]</li>
<li><a href="https://github.com/erikd/libsndfile/">libsndfile</a> - C library with C++ wrapper for reading and writing files containing sampled sound through one standard library interface. [LGPL-2.1] <a href="http://www.mega-nerd.com/libsndfile/">website</a></li>
<li><a href="https://github.com/andrewrk/libsoundio">libsoundio</a> - C library for cross-platform real-time audio input and output. [MIT] <a href="http://libsound.io/">website</a></li>
<li><a href="https://github.com/micknoise/Maximilian">Maximilian</a> - C++ Audio and Music DSP Library. [MIT]</li>
<li><a href="http://www.openal.org/">OpenAL</a> - Open Audio Library - A crossplatform audio API. [BSD/LGPL/Commercial]</li>
<li><a href="https://github.com/mackron/miniaudio">miniaudio</a> - Single file audio playback and capture library. [Unlicense] <a href="https://miniaud.io/">website</a></li>
<li><a href="https://github.com/NativeInstruments/ni-media">ni-media</a> - C++ library for reading and writing audio files. [MIT]</li>
<li><a href="http://opus-codec.org/">Opus</a> - A totally open, royalty-free, highly versatile audio codec. [BSD]</li>
<li><a href="http://www.portaudio.com/">PortAudio</a> - PortAudio is a free, cross-platform, open-source, audio I/O library. [MIT]</li>
<li><a href="https://github.com/sahaRatul/sela">SELA</a> - SimplE Lossless Audio. [MIT]</li>
<li><a href="https://github.com/jarikomppa/soloud">SoLoud</a> - Easy, portable audio engine for games. [zlib]</li>
<li><a href="http://www.speex.org/">Speex</a> - A free codec for free speech. Obsoleted by Opus. [BSD]</li>
<li><a href="https://github.com/TonicAudio/Tonic">Tonic</a> - Easy and efficient audio synthesis in C++. [Unlicense]</li>
<li><a href="http://xiph.org/vorbis/">Vorbis</a> - Ogg Vorbis is a fully open, non-proprietary, patent-and-royalty-free, general-purpose compressed audio format. [BSD]</li>
<li><a href="https://github.com/lieff/minimp3">minimp3</a> - Public domain, header-only MP3 decoder with clean-room implementation. [CC0]</li>
<li><a href="https://github.com/rism-ch/verovio">Verovio</a> - Verovio is a fast and lightweight music notation engraving library. [LGPL] <a href="https://www.verovio.org">website</a></li>
<li><a href="https://github.com/facebookresearch/wav2letter/">Wav2Letter++</a> - Public domain, a fast open source speech processing toolkit written entirely in C++ and uses the ArrayFire tensor library and the flashlight machine learning library for maximum efficiency [BSD]</li>
</ul>
<h2 id="biology">Biology</h2>
<p><em>Bioinformatics, Genomics, Biotech</em></p>
<ul>
<li><a href="http://biocpp.sourceforge.net/">BioC++</a> - C++ Computational Libraries for Bioinformatics. [BSD]</li>
<li><a href="http://www.cs.ox.ac.uk/chaste/">Chaste</a> - An open source C++ library for the computational simulation of mathematical models developed for physiology and biology. [BSD]</li>
<li><a href="http://molpopgen.github.io/libsequence/">libsequence</a> - A C++ library for representing and analyzing population genetics data. [GPL]</li>
<li><a href="http://www.seqan.de/">SeqAn</a> - Algorithms and data structures for the analysis of sequences with the focus on biological data. [BSD/3-clause]</li>
<li><a href="https://github.com/ekg/vcflib">Vcflib</a> - A C++ library for parsing and manipulating VCF files. [MIT]</li>
<li><a href="https://github.com/zeeev/wham">Wham</a> - Structural variants (SVs) in Genomes by directly applying association tests to BAM files. [MIT]</li>
</ul>
<h2 id="bittorrent">BitTorrent</h2>
<ul>
<li><a href="https://github.com/jech/dht">jech/dht</a> - BitTorrent DHT library in C. [MIT]</li>
<li><a href="https://github.com/arvidn/libtorrent">libtorrent</a> (a.k.a. libtorrent-rasterbar) - An efficient feature complete C++ bittorrent implementation. [BSD]</li>
<li><a href="https://github.com/rakshasa/libtorrent">LibTorrent</a> (a.k.a. libtorrent-rakshasa) - BitTorrent library. [GPL]</li>
<li><a href="https://github.com/bittorrent/libutp">libutp</a> - uTorrent Transport Protocol library. [MIT]</li>
</ul>
<h2 id="chemistry">Chemistry</h2>
<p><em>Chemistry, Quantum Chemistry, Solid-State Chemistry/Physics, Geochemistry, Biochemistry</em></p>
<ul>
<li><a href="https://github.com/d-SEAMS/seams-core">d-SEAMS</a> - A molecular dynamics trajectory analysis engine in C++ and Lua with Nix. It is an acronym for Deferred Structural Elucidation Analysis for Molecular Simulations. [GPL] <a href="https://dseams.info">website</a></li>
<li><a href="https://github.com/gromacs/gromacs">gromacs</a> - A message-passing parallel molecular dynamics implementation. [GPL] <a href="http://www.gromacs.org">website</a></li>
<li><a href="https://github.com/reaktoro/reaktoro">Reaktoro</a> - A computational framework in C++ and Python for modeling chemically reactive systems. [LGPL] <a href="https://reaktoro.org">website</a></li>
<li><a href="https://github.com/lammps/lammps">LAMMPS</a> - A classical molecular dynamics code with a focus on materials modeling. It’s an acronym for Large-scale Atomic/Molecular Massively Parallel Simulator. [GPL] <a href="https://lammps.sandia.gov/">website</a></li>
<li><a href="https://github.com/m-a-d-n-e-s-s/madness">MADNESS</a> - Multiresolution Adaptive Numerical Environment for Scientific Simulation. [GPL] <a href="https://github.com/m-a-d-n-e-s-s/madness">website</a></li>
<li><a href="https://github.com/ValeevGroup/mpqc">MPQC</a> - The Massively Parallel Quantum Chemistry program, MPQC, computes properties of atoms and molecules from first principles using the time independent Schrödinger equation. [GPL] <a href="https://mpqc.org/">website</a></li>
<li><a href="https://en.wikipedia.org/wiki/ORCA_(quantum_chemistry_program)">ORCA</a> - An ab initio quantum chemistry program package that contains modern electronic structure methods. [Academic] <a href="https://orcaforum.kofo.mpg.de/">website</a></li>
<li><a href="https://github.com/psi4/psi4">Psi</a> - An ab initio computational chemistry package. [GPL] <a href="https://psicode.org/">website</a></li>
</ul>
<h2 id="cli">CLI</h2>
<p><em>Console/Terminal User Interface, Command Line Interface</em></p>
<ul>
<li><a href="https://github.com/adishavit/argh">Argh!</a> - A minimalist, frustration-free, header-only argument handler. [BSD]</li>
<li><a href="https://github.com/taywee/args">Taywee/args</a> - A simple header-only C++ argument parser library. [MIT]</li>
<li><a href="http://www.boost.org/doc/libs/1_57_0/doc/html/program_options.html">Boost.Program_options</a> - A library to obtain program options via conventional methods such as command line and config file. [Boost]</li>
<li><a href="https://github.com/catchorg/Clara">Clara</a> - A simple to use, composable, command line parser for C++ 11 and beyond. [BSL-1.0]</li>
<li><a href="https://github.com/daniele77/cli">cli</a> - A cross-platform header only C++14 library for interactive command line interfaces (Cisco style). [Boost]</li>
<li><a href="https://github.com/CLIUtils/CLI11">CLI11</a> - Header only single or multi-file C++11 library for simple and advanced CLI parsing. [BSD]</li>
<li><a href="https://github.com/jarro2783/cxxopts">jarro2783/cxxopts</a> - Lightweight C++ command line option parser. [MIT]</li>
<li><a href="https://github.com/docopt/docopt.cpp">docopt.cpp</a> - A library to generate option parser from docstring. [MIT/Boost]</li>
<li><a href="https://github.com/gansm/finalcut">FINAL CUT</a> - Library for creating terminal applications with text-based widgets. [LGPL]</li>
<li><a href="https://gflags.github.io/gflags/">gflags</a> - Commandline flags module for C++. [BSD]</li>
<li><a href="https://github.com/p-ranav/indicators/">indicators</a> - Activity indicators for Modern C++. [MIT]</li>
<li><a href="https://github.com/antirez/linenoise">linenoise</a> - A small self-contained alternative to readline and libedit. [BSD-2-Clause]</li>
<li><a href="https://github.com/arangodb/linenoise-ng">linenoise-ng</a> - A small, portable GNU readline replacement for Linux, Windows and MacOS which is capable of handling UTF-8 characters. [BSD]</li>
<li><a href="https://github.com/bfgroup/Lyra">Lyra</a> - A simple to use, composable, command line parser for C++ 11 and beyond. [Boost]</li>
<li><a href="http://invisible-island.net/ncurses/">Ncurses</a> - A terminal user interface. [MIT]</li>
<li><a href="https://github.com/s9w/oof">oof</a> - Convenient, high-performance RGB color and position control for console output. [MIT]</li>
<li><a href="https://github.com/wmcbrine/PDCurses">PDCurses</a> - Public domain curses library with both source code and pre-compiled library available. [PublicDomain]</li>
<li><a href="https://github.com/badaix/popl">popl</a> - A single-header templated command line arguments and ini file parser for C++ 11 and beyond. [MIT]</li>
<li><a href="https://github.com/AmokHuginnsson/replxx">replxx</a> - A readline and libedit replacement that supports UTF-8, syntax highlighting, hints, works on Unix and Windows. [BSD]</li>
<li><a href="https://github.com/p-ranav/tabulate">tabulate</a> - Table Maker for Modern C++ [MIT]</li>
<li><a href="http://tclap.sourceforge.net">TCLAP</a> - A mature, stable and feature-rich library for defining and accessing command line arguments in ANSI C++. [MIT]</li>
<li><a href="https://github.com/nsf/termbox">termbox</a> - A C library for writing text-based user interfaces. [MIT]</li>
<li><a href="https://github.com/jupyter-xeus/cpp-terminal">cpp-terminal</a> - Small header only C++ library for writing multiplatform terminal applications. [MIT]</li>
<li><a href="https://github.com/ArthurSonzogni/FTXUI">FTXUI</a> - C++ Functional Terminal User Interface. [MIT]</li>
<li><a href="https://github.com/ggerganov/imtui">imtui</a> - Immediate Mode Text-based User Interface [MIT]</li>
</ul>
<h2 id="compression">Compression</h2>
<p><em>Compression and Archiving Libraries</em></p>
<ul>
<li><a href="https://github.com/rikyoz/bit7z">bit7z</a> - A C++ static library offering a clean and simple interface to the 7-zip DLLs. [GPLv2]</li>
<li><a href="https://github.com/google/brotli">Brotli</a> - Brotli compression format. Developed by Google. [MIT]</li>
<li><a href="http://www.bzip.org/">bzip2</a> - A freely available, patent free, high-quality data compressor. [BSD]</li>
<li><a href="https://github.com/Cyan4973/FiniteStateEntropy">FiniteStateEntropy</a> - New generation entropy codecs : Finite State Entropy and Huff0.</li>
<li><a href="https://icculus.org/physfs/">PhysicsFS</a> - A library to provide abstract access to various archives. It is intended for use in video games, and the design was somewhat inspired by Quake 3’s file subsystem. [zlib]</li>
<li><a href="https://api.kde.org/frameworks/karchive/html/index.html">KArchive</a> - A library for creating, reading, writing and manipulating file archives like zip and tar. It also provides transparent compression and decompression of data, using formats like gzip, via a subclass of QIODevice. [LGPL]</li>
<li><a href="https://github.com/libarchive/libarchive">libarchive</a> - Multi-format archive and compression library. [New BSD] <a href="http://www.libarchive.org/">website</a></li>
<li><a href="https://github.com/lz4/lz4">LZ4</a> - Extremely Fast Compression algorithm. [BSD] <a href="http://www.lz4.org/">website</a></li>
<li><a href="https://github.com/lzfse/lzfse">LZFSE</a> - LZFSE compression library and command line tool. Developed by Apple.</li>
<li><a href="https://code.google.com/p/lzham/">LZHAM</a> - Lossless data compression library with a compression ratio similar to LZMA but with much faster decompression. [BSD]</li>
<li><a href="http://www.7-zip.org/sdk.html">LZMA</a> :zap: - The default and general compression method of 7z format. [PublicDomain]</li>
<li><a href="http://www.matcode.com/lzmat.htm">LZMAT</a> - An extremely fast real-time lossless data compression library. [GPL]</li>
<li><a href="https://github.com/richgel999/miniz">miniz</a> - Single C source file Deflate/Inflate compression library with zlib-compatible API, ZIP archive reading/writing, PNG writing. [MIT]</li>
<li><a href="https://github.com/nmoinvaz/minizip">Minizip</a> - Zlib with latest bug fixes that supports PKWARE disk spanning, AES encryption, and IO buffering. [zlib]</li>
<li><a href="https://github.com/antirez/smaz">smaz</a> - Small strings compression library. [BSD]</li>
<li><a href="https://google.github.io/snappy/">Snappy</a> - A fast compressor/decompressor. [BSD]</li>
<li><a href="http://zlib.net/">ZLib</a> - A very compact compression library for data streams. [zlib]</li>
<li><a href="https://github.com/Dead2/zlib-ng">zlib-ng</a> - zlib for the “next generation” systems. Drop-In replacement with some serious optimizations. [zlib]</li>
<li><a href="https://github.com/facebook/zstd">zstd</a> - Zstandard - Fast real-time compression algorithm. Developed by Facebook. [BSD]</li>
<li><a href="http://zziplib.sourceforge.net/">ZZIPlib</a> - Provides read access on ZIP-archives. [MPL/LGPL]</li>
</ul>
<h2 id="concurrency">Concurrency</h2>
<p><em>Concurrency and Multithreading</em></p>
<ul>
<li><a href="https://github.com/ComputationalRadiationPhysics/alpaka">alpaka</a> - Abstraction library for parallel kernel acceleration. [LGPLv3+]</li>
<li><a href="https://github.com/arrayfire/arrayfire">ArrayFire</a> - A general purpose GPU library. [BSD]</li>
<li><a href="https://github.com/Amanieu/asyncplusplus">Async++</a> - A lightweight concurrency framework for C++11, inspired by the Microsoft PPL library and the N3428 C++ standard proposal. [MIT]</li>
<li><a href="https://github.com/boostorg/compute">Boost.Compute</a> - A C++ GPU Computing Library for OpenCL. [Boost]</li>
<li><a href="https://github.com/HSA-Libraries/Bolt">Bolt</a> - A C++ template library optimized for GPUs. [Apache2]</li>
<li><a href="https://github.com/concurrencykit/ck">ck</a> - Concurrency primitives, safe memory reclamation mechanisms and non-blocking data structures. [BSD]</li>
<li><a href="https://github.com/cameron314/concurrentqueue">concurrentqueue</a> - A fast multi-producer, multi-consumer lock-free concurrent queue for C++11. [BSD,Boost]</li>
<li><a href="https://github.com/cpp-taskflow/cpp-taskflow">Cpp-Taskflow</a> - Fast C++ Parallel Programming with Task Dependencies. [MIT]</li>
<li><a href="https://github.com/NVlabs/cub">CUB</a> - CUB provides state-of-the-art, reusable software components for every layer of the CUDA programming mode. [New BSD]</li>
<li><a href="https://github.com/eyalroz/cuda-api-wrappers">cuda-api-wrappers</a> - Lightweight, Modern-C++ wrappers for the CUDA GPU programming runtime API. [BSD]</li>
<li><a href="https://github.com/ComputationalRadiationPhysics/cupla">cupla</a> - C++ API to run CUDA/C++ on OpenMP, Threads, TBB, … through Alpaka. [LGPLv3+]</li>
<li><a href="https://github.com/schlangster/cpp.react">C++React</a> - A reactive programming library for C++11. [Boost]</li>
<li><a href="https://github.com/RichieSams/FiberTaskingLib">FiberTaskingLib</a> - Task-based multi-threading library that supports task graphs with arbitrary dependencies. [Apache]</li>
<li><a href="https://github.com/STEllAR-GROUP/hpx/">HPX</a> - A general purpose C++ runtime system for parallel and distributed applications of any scale. [Boost]</li>
<li><a href="https://github.com/GameTechDev/GTS-GamesTaskScheduler">Intel Games Task Scheduler</a> - A task scheduling framework designed for the needs of game developers. [MIT]</li>
<li><a href="https://github.com/intel/parallelstl">Intel Parallel STL</a> - Intel® implementation of C++17 STL for C++11 and above. [Apache2]</li>
<li><a href="https://www.threadingbuildingblocks.org/">Intel TBB</a> - Intel® Threading Building Blocks. [Apache2]</li>
<li><a href="https://github.com/preshing/junction">junction</a> - A library of concurrent data structures in C++. [BSD]</li>
<li><a href="https://github.com/kokkos/kokkos">Kokkos</a> - A performance portable programming model for parallel execution and memory abstraction. [BSD]</li>
<li><a href="https://github.com/khizmax/libcds">libcds</a> - A C++ library of Concurrent Data Structures. [BSD]</li>
<li><a href="https://github.com/libclsph/libclsph">Libclsph</a> - An OpenCL based GPU accelerated SPH fluid simulation library. [MIT]</li>
<li><a href="https://github.com/sustrik/libdill/">libdill</a> - Introduces structured concurrency in C. [MIT]</li>
<li><a href="https://github.com/apple/swift-corelibs-libdispatch">libdispatch</a> - Grand Central Dispatch (GCD), developed by Apple Inc., is a task parallelism technology based on the thread pool pattern. libdispatch is a library that provides the implementation of GCD’s services. [Apache-2.0] <a href="https://apple.github.io/swift-corelibs-libdispatch/">website</a></li>
<li><a href="https://github.com/sustrik/libmill/">libmill</a> - Introduces Go-style concurrency in C. [MIT]</li>
<li><a href="https://github.com/google/marl">marl</a> - Marl is a hybrid thread / fiber task scheduler written in C++ 11. [Apache-2.0]</li>
<li><a href="https://github.com/moderngpu/moderngpu">moderngpu</a> - moderngpu is a productivity library for general-purpose computing on GPUs. It is a header-only C++ library written for CUDA. The unique value of the library is in its accelerated primitives for solving irregularly parallel problems. [FreeBSD & Copyright, Sean Baxter]</li>
<li><a href="https://github.com/NVIDIA/nccl">NCCL</a> - Optimized primitives for collective multi-GPU communication. [BSD]</li>
<li><a href="https://www.khronos.org/opencl/">OpenCL</a> - The open standard for parallel programming of heterogeneous systems.</li>
<li><a href="http://openmp.org/">OpenMP</a> - The OpenMP API.</li>
<li><a href="https://github.com/basiliscos/cpp-rotor">rotor</a> - Event loop friendly C++ actor micro framework. [MIT]</li>
<li><a href="https://github.com/Stiffstream/sobjectizer">SObjectizer</a> - An implementation of Actor, Publish-Subscribe, and CSP models in one rather small C++ framework. [BSD-3-Clause]</li>
<li><a href="https://github.com/bloomberg/quantum">Quantum</a> - A powerful C++ coroutine dispatcher framework built on top of <a href="https://www.boost.org/doc/libs/1_65_0/libs/coroutine2/doc/html/index.html">boost::coroutines2</a>.</li>
<li><a href="http://raftlib.io/">RaftLib</a> - The RaftLib C++ library, streaming/dataflow concurrency via C++ iostream-like operators [Apache2]</li>
<li><a href="https://github.com/cameron314/readerwriterqueue">readerwriterqueue</a> - A fast single-producer, single-consumer lock-free queue for C++. [BSD]</li>
<li><a href="https://github.com/stotko/stdgpu">stdgpu</a> - Efficient STL-like Data Structures on the GPU. [Apache2]</li>
<li><a href="http://thrust.github.io/">Thrust</a> - A parallel algorithms library which resembles the C++ Standard Template Library (STL). [Apache2]</li>
<li><a href="https://github.com/bloomen/transwarp">transwarp</a> - A header-only C++ library for task concurrency. [MIT]</li>
<li><a href="https://github.com/ddemidov/vexcl">VexCL</a> - A C++ vector expression template library for OpenCL/CUDA. [MIT]</li>
<li><a href="http://parasol-lab.gitlab.io/stapl-home/">STAPL</a> - A C++ parallel programming framework designed to work on both shared and distributed memory parallel computers. [BSD]</li>
<li><a href="https://github.com/David-Haim/concurrencpp">concurrencpp</a> - A general concurrency library containing tasks, executors, timers and C++20 coroutines to rule them all.</li>
</ul>
<h2 id="configuration">Configuration</h2>
<p><em>Configuration files, INI files</em></p>
<ul>
<li><a href="https://github.com/Rookfighter/inifile-cpp">inifile-cpp</a> - A header-only and easy to use Ini file parser for C++. [MIT]</li>
<li><a href="https://github.com/benhoyt/inih">inih</a> - Simple .INI file parser in C, good for embedded systems. [BSD-3-Clause]</li>
<li><a href="https://github.com/jtilly/inih">inih</a> - Single header only C++ version of <a href="https://github.com/benhoyt/inih">inih</a>. [BSD-3-Clause]</li>
<li><a href="https://github.com/ndevilla/iniparser">iniparser</a> - INI file parser. [MIT]</li>
<li><a href="https://github.com/hyperrealm/libconfig">libconfig</a> - C, C++ library for processing structured configuration files. [LGPL-2.1] <a href="https://hyperrealm.github.io/libconfig/">website</a></li>
<li><a href="https://github.com/martinh/libconfuse">libconfuse</a> - Small configuration file parser library for C. [ISC]</li>
<li><a href="https://github.com/brofield/simpleini">simpleini</a> - Cross-platform C++ library providing a simple API to read and write INI-style configuration files. [MIT]</li>
<li><a href="https://github.com/marzer/tomlplusplus">toml++</a> - Header-only TOML parser and serializer for C++17 and later. [MIT] <a href="https://marzer.github.io/tomlplusplus/">website</a></li>
</ul>
<h2 id="containers">Containers</h2>
<ul>
<li><a href="https://github.com/algorithm-ninja/cpp-btree">C++ B-tree</a> - A template library that implements ordered in-memory containers based on a B-tree data structure. [Apache2]</li>
<li><a href="https://github.com/mattreecebentley/plf_colony">Colony</a> - An unordered “bag”-type container which outperforms std containers in high-modification scenarios while maintaining permanent pointers to non-erased elements regardless of insertion/erasure. [zLib] <a href="http://www.plflib.org/colony.htm">website</a></li>
<li><a href="https://github.com/pinam45/dynamic_bitset">dynamic_bitset</a> - A C++17 header-only dynamic bitset. [MIT]</li>
<li><a href="https://github.com/xorz57/forest">Forest</a> - Template library implementing an AVL, a Binary Search, a KD and a Quad Tree. [MIT]</li>
<li><a href="https://github.com/goossaert/hashmap">Hashmaps</a> - Implementation of open addressing hash table algorithms in C++. [MIT]</li>
<li><a href="https://github.com/Tessil/hopscotch-map">Hopscotch map</a> - A fast header-only hash map which uses hopscotch hashing for collisions resolution. [MIT]</li>
<li><a href="https://github.com/RSIA-LIESMARS-WHU/LSHBOX">LSHBOX</a> - A c++ toolbox of locality-sensitive hashing (LSH), provides several popular LSH algorithms, also support Python and MATLAB. [GPL]</li>
<li><a href="https://github.com/gvinciguerra/PGM-index">PGM-index</a> - A data structure that enables fast lookup, predecessor, range searches and updates in arrays of billions of items using orders of magnitude less space than traditional indexes. [Apache2] <a href="https://pgm.di.unipi.it">website</a></li>
<li><a href="https://github.com/mattreecebentley/plf_list">plf::list</a> - A std::list implementation which removes range splicing in order to enable cache-friendlier structure, yielding significant performance gains. [zLib] <a href="http://www.plflib.org/list.htm">website</a></li>
<li><a href="https://github.com/mattreecebentley/plf_stack">plf::stack</a> - A replacement container for the std::stack container adaptor, with better performance than any std container in a stack context. [zLib] <a href="http://www.plflib.org/stack.htm">website</a></li>
<li><a href="https://github.com/martinmoene/ring-span-lite">ring_span lite</a> - A simplified implementation of Arthur O’Dwyer’s ring_span implementation ie. a circular buffer view. [MIT]</li>
<li><a href="https://github.com/martinus/robin-hood-hashing">robin-hood-hashing</a> - Fast & memory efficient hashtable based on robin hood hashing for C++14. [MIT]</li>
<li><a href="https://github.com/Tessil/robin-map">robin-map</a> - Fast hash map and hash set using robin hood hashing. [MIT]</li>
<li><a href="https://github.com/greg7mdp/sparsepp">sparsepp</a> - A fast, memory efficient hash map for C++. [BSD 3-clause]</li>
</ul>
<h2 id="cryptography">Cryptography</h2>
<p><em>Cryptography and Encryption Libraries</em></p>
<ul>
<li><a href="http://bcrypt.sourceforge.net/">Bcrypt</a> - A cross platform file encryption utility. Encrypted files are portable across all supported operating systems and processors. [BSD]</li>
<li><a href="http://beecrypt.sourceforge.net/">BeeCrypt</a> - A portable and fast cryptography library. [LGPLv2.1+]</li>
<li><a href="http://botan.randombit.net/">Botan</a> - A crypto library for C++. [BSD-2]</li>
<li><a href="https://github.com/weidai11/cryptopp">Crypto++</a> - A free C++ class library of cryptographic schemes. [Boost] <a href="http://www.cryptopp.com/">website</a></li>
<li><a href="https://github.com/kerukuro/digestpp">digestpp</a> - C++11 header-only message digest (hash) library. [PublicDomain]</li>
<li><a href="https://www.gnupg.org/">GnuPG</a> - A complete and free implementation of the OpenPGP standard. [GPL]</li>
<li><a href="http://www.gnutls.org/">GnuTLS</a> - A secure communications library implementing the SSL, TLS and DTLS protocols. [LGPL2.1]</li>
<li><a href="http://www.gnu.org/software/libgcrypt/">Libgcrypt</a> - A general purpose cryptographic library originally based on code from GnuPG. [LGPLv2.1+]</li>
<li><a href="http://www.libressl.org/">LibreSSL</a> - A free version of the SSL/TLS protocol forked from OpenSSL in 2014. [?]</li>
<li><a href="https://github.com/jedisct1/libsodium">libsodium</a> - P(ortable|ackageable) NaCl-based crypto library, opinionated and easy to use. [ISC]</li>
<li><a href="https://github.com/jedisct1/libhydrogen">libhydrogen</a> - A lightweight, secure, easy-to-use crypto library suitable for constrained environments. [ISC]</li>
<li><a href="https://github.com/libtom/libtomcrypt">LibTomCrypt</a> - A fairly comprehensive, modular and portable cryptographic toolkit. [WTFPL]</li>
<li><a href="https://github.com/ARMmbed/mbedtls">mbedTLS</a> - An open source, portable, easy to use, readable and flexible SSL library, previously known as PolarSSL. [Apache2] <a href="https://tls.mbed.org/">website</a></li>
<li><a href="http://www.lysator.liu.se/~nisse/nettle/">Nettle</a> - A low-level cryptographic library. [LGPL]</li>
<li><a href="https://github.com/openssl/openssl">OpenSSL</a> - A robust, commercial-grade, full-featured, and Open Source cryptography library. [Apache] <a href="http://www.openssl.org/">website</a></li>
<li><a href="https://github.com/MaciejCzyzewski/retter">retter</a> - A collection of hash functions, ciphers, tools, libraries, and materials related to cryptography.</li>
<li><a href="https://github.com/awslabs/s2n">s2n</a> - An implementation of the TLS/SSL protocols. [Apache]</li>
<li><a href="https://github.com/cr-marcstevens/sha1collisiondetection">sha1collisiondetection</a> - Library and command line tool to detect SHA-1 collision in a file. [MIT]</li>
<li><a href="https://github.com/google/tink">Tink</a> - A multi-language, cross-platform library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse. [Apache-2.0]</li>
<li><a href="https://github.com/kokke/tiny-AES-c">Tiny AES in C</a> - Small portable AES128/192/256 in C. [PublicDomain]</li>
<li><a href="https://github.com/cossacklabs/themis">Themis</a> - crypto library for painless data security, providing symmetric and asymmetric encryption, secure sockets with forward secrecy, for mobile and server platforms. [Apache2]</li>
</ul>
<h2 id="csv">CSV</h2>
<p><em>Libraries for parsing Comma Separated Value (CSV) files</em></p>
<ul>
<li><a href="https://github.com/p-ranav/csv2">csv2</a> - Fast CSV parser for modern C++. [MIT]</li>
<li><a href="https://github.com/ashaduri/csv-parser">Csv::Parser</a> - Compile-time and runtime CSV parser written in C++17. [Zlib]</li>
<li><a href="https://github.com/ben-strasser/fast-cpp-csv-parser">Fast C++ CSV Parser</a> - Small, easy-to-use and fast header-only library for reading CSV files. [BSD-3-Clause]</li>
<li><a href="https://github.com/vincentlaucsb/csv-parser">Vince’s CSV Parser</a> - A fast, self-contained, streaming C++17 CSV parser with optional type-casting and statistics. [MIT]</li>
</ul>
<h2 id="database">Database</h2>
<p><em>Database Libraries, SQL Servers, ODBC Drivers, and Tools</em></p>
<ul>
<li><a href="https://github.com/ClickHouse/clickhouse-cpp">ClickHouse</a> - C++ client for ClickHouse DBMS. [Apache2]</li>
<li><a href="https://github.com/paulftw/hiberlite">hiberlite</a> - C++ Object-relational mapping for sqlite3. [BSD]</li>
<li><a href="https://github.com/redis/hiredis">Hiredis</a> - A minimalistic C client library for the Redis database. [BSD]</li>
<li><a href="https://github.com/google/leveldb">LevelDB</a> - A fast key-value storage library written at Google that provides an ordered mapping from string keys to string values. [BSD]</li>
<li><a href="http://symas.com/mdb/">LMDB</a> - Very fast embedded key/value store with full ACID semantics. [OpenLDAP]</li>
<li><a href="https://github.com/bendiken/lmdbxx">LMDB++</a> - C++11 wrapper for the LMDB embedded database library. [PublicDomain]</li>
<li><a href="https://github.com/mongodb/mongo-c-driver">MongoDB C Driver</a> - MongoDB client library for C. [Apache2]</li>
<li><a href="https://github.com/mongodb/mongo-cxx-driver">MongoDB C++ Driver</a> - C++ driver for MongoDB. [Apache2]</li>
<li><a href="https://github.com/mongodb/libbson">MongoDB Libbson</a> - A BSON utility library. [Apache2]</li>
<li><a href="http://www.tangentsoft.net/mysql++/">MySQL++</a> - A C++ wrapper for MySQL’s C API. [LGPL]</li>
<li><a href="https://github.com/nanodbc/nanodbc">nanodbc</a> - A small C++ wrapper for the native C ODBC API. [MIT]</li>
<li><a href="https://www.codesynthesis.com/products/odb/">ODB</a> - An open-source, cross-platform, and cross-database object-relational mapping (ORM) system for C++. [GPLv2]</li>
<li><a href="https://github.com/luca3m/redis3m">redis3m</a> - Wrapper of hiredis with clean C++ interface, supporting sentinel and ready to use patterns. [Apache2]</li>
<li><a href="https://github.com/facebook/rocksdb">RocksDB</a> - Embedded key-value store for fast storage from facebook. [BSD]</li>
<li><a href="https://github.com/LiveAsynchronousVisualizedArchitecture/simdb">SimDB</a> - High performance, shared memory, lock free, cross platform, single file, minimal dependencies, C++11 key-value store [Apache2]</li>
<li><a href="https://github.com/SOCI/soci">SOCI</a> - A database abstraction layer for C++. [BSL-1.0]</li>
<li><a href="http://www.sqlite.org/">SQLite</a> - A completely embedded, full-featured relational database in a few 100k that you can include right into your project. [PublicDomain]</li>
<li><a href="https://github.com/SRombauts/SQLiteCpp">SQLiteC++</a> - SQLiteC++ (SQLiteCpp) is a smart and easy to use C++ SQLite3 wrapper. [MIT]</li>
<li><a href="https://github.com/SqliteModernCpp/sqlite_modern_cpp">sqlite_modern_cpp</a> - Header only C++14 wrapper around sqlite library. [MIT]</li>
<li><a href="https://github.com/fnc12/sqlite_orm">sqlite_orm</a> - SQLite ORM light header only library for modern C++. [AGPL + paid MIT]</li>
<li><a href="https://github.com/rbock/sqlpp11">sqlpp11</a> - A type safe embedded domain specific language for SQL queries and results in C++. [BSD-2-Clause]</li>
<li><a href="https://github.com/TileDB-Inc/TileDB">TileDB</a> - Fast Dense and Sparse Multidimensional Array DBMS. [MIT] <a href="https://tiledb.io/">website</a></li>
<li><a href="https://github.com/symisc/unqlite">UnQLite</a> - A self-contained, serverless, zero-configuration, transactional NoSQL engine. [BSD-2-Clause] <a href="https://unqlite.org/">website</a></li>
<li><a href="https://upscaledb.com">upscaledb</a> - An embedded “typed” key/value store with a built-in query interface. [GPLv3]</li>
</ul>
<h2 id="data-visualization">Data visualization</h2>
<p><em>Data visiualization Libraries</em></p>
<ul>
<li><a href="https://github.com/alandefreitas/matplotplusplus">matplotplusplus</a> - C++ Graphics Library for Data Visualization. [MIT] <a href="https://alandefreitas.github.io/matplotplusplus/">website</a></li>
</ul>
<h2 id="debug">Debug</h2>
<p><em>Debugging Libraries, Memory Leak and Resource Leak Detection, Unit Testing</em></p>
<ul>
<li><a href="https://github.com/bombela/backward-cpp">backward-cpp</a> - A beautiful stack trace pretty printer for C++. [MIT]</li>
<li><a href="https://github.com/google/benchmark">benchmark</a> - Google provided small microbenchmark support library. [Apache2]</li>
<li><a href="http://www.boost.org/doc/libs/master/libs/test/doc/html/index.html">Boost.Test</a> - Boost Test Library. [Boost]</li>
<li><a href="https://github.com/libcheck/check">check</a> - Check is a unit testing framework for C. [LGPL-2.1] <a href="https://libcheck.github.io/check/">website</a></li>
<li><a href="https://github.com/onqtam/doctest">doctest</a> - The lightest feature rich C++ single header testing framework. [MIT]</li>
<li><a href="https://github.com/catchorg/Catch2">Catch2</a> - A modern, C++-native, header-only, test framework for unit-tests, TDD and BDD. [BSL-1.0]</li>
<li><a href="https://github.com/DigitalInBlue/Celero">Celero</a> - C++ Benchmarking Framework. [Apache2]</li>
<li><a href="https://github.com/cpputest/cpputest">CppUTest</a> - Unit testing and mocking framework for C/C++. [BSD-3-clause]</li>
<li><a href="http://cute-test.com">CUTE</a> - C++ Unit Testing Easier. [LGPL3]</li>
<li><a href="https://cmocka.org/">CMocka</a> - unit testing framework for C with support for mock objects. [Apache2]</li>
<li><a href="http://www.freedesktop.org/wiki/Software/cppunit/">CppUnit</a> - C++ port of JUnit. [LGPL2]</li>
<li><a href="https://cmake.org/cmake/help/v2.8.8/ctest.html">CTest</a> - The CMake test driver program. [BSD]</li>
<li><a href="https://github.com/sharkdp/dbg-macro">dbg-macro</a> - A dbg(…) macro for C++. [MIT]</li>
<li><a href="https://github.com/CobaltFusion/DebugViewPP">DebugViewPP</a> - Debug logging viewer. [BSL]</li>
<li><a href="http://www.deleaker.com">Deleaker</a> - A tool for resource leak detection, including memory, GDI and handle leaks.</li>
<li><a href="https://github.com/meekrosoft/fff">fff</a> - A micro-framework for creating fake C functions. [MIT]</li>
<li><a href="https://github.com/google/googletest/blob/master/googlemock/README.md">Google Mock</a> - A library for writing and using C++ mock classes. [BSD]</li>
<li><a href="https://github.com/google/googletest">Google Test</a> - Google C++ Testing Framework. [BSD]</li>
<li><a href="https://github.com/deplinenoise/ig-debugheap">ig-debugheap</a> - Multiplatform debug heap useful for tracking down memory errors. [BSD]</li>
<li><a href="https://github.com/zorgnax/libtap">libtap</a> - Write tests in C. [GPL2]</li>
<li><a href="http://www.almostinfinite.com/memtrack.html">MemTrack</a> - Tracking memory allocations in C++.</li>
<li><a href="https://github.com/jonasmr/microprofile">microprofile</a> - Profiler with web-view for multiple platforms. [Unlicense]</li>
<li><a href="https://github.com/siu/minunit">MinUnit</a> - A minimal unit testing framework for C self-contained in a single header file. [MIT]</li>
<li><a href="http://www.mockator.com">Mockator</a> - Eclipse CDT plug-in for C++ Seams and Mock Objects.</li>
<li><a href="https://github.com/mattreecebentley/plf_nanotimer">Nanotimer</a> - A simple low-overhead cross-platform timer class for benchmarking. [zLib] <a href="http://www.plflib.org/nanotimer.htm">website</a></li>
<li><a href="https://github.com/libnonius/nonius">Nonius</a> - A C++ micro-benchmarking framework. [CC]</li>
<li><a href="https://github.com/Celtoys/Remotery">Remotery</a> - Single C File Profiler with Web Viewer. [Apache2]</li>
<li><a href="https://github.com/trytouca/touca-cpp">Touca</a> - Automated regression testing system for testing complex mission-critical workflows. [Apache2] <a href="https://touca.io/">website</a></li>
<li><a href="https://github.com/unittest-cpp/unittest-cpp">UnitTest++</a> - A lightweight unit testing framework for C++. [MIT/X Consortium license]</li>
<li><a href="https://github.com/ThrowTheSwitch/Unity">Unity</a> - Simple Unit Testing for C. [MIT]</li>
<li><a href="https://github.com/sheredom/utest.h">utest.h</a> - Single header unit testing framework for C and C++. [Unlicense]</li>
<li><a href="https://github.com/boost-experimental/ut">μt</a> - C++20 single header/single module, macro-free μ(micro)/Unit Testing Framework [Boost]</li>
<li><a href="https://kinddragon.github.io/vld//">VLD</a> - Visual Leak Detector. A free, robust, open-source memory leak detection system for Visual C++.</li>
</ul>
<h2 id="font">Font</h2>
<p><em>Libraries for parsing and manipulating font files.</em></p>
<ul>
<li><a href="https://gitlab.freedesktop.org/fontconfig/fontconfig">Fontconfig</a> - Font configuration and customization library. [MIT] <a href="https://www.freedesktop.org/wiki/Software/fontconfig/">website</a></li>
<li><a href="https://www.freetype.org/">FreeType</a> - FreeType is a freely available software library to render fonts. [FTL & GPLv2]</li>
<li><a href="https://github.com/caryll/otfcc">otfcc</a> - A C library and utility used for parsing and writing OpenType font files. [Apache-2.0]</li>
</ul>
<h2 id="game-engine">Game Engine</h2>
<ul>
<li><a href="https://github.com/Equilibrium-Games/Acid">Acid</a> - A high speed C++17 Vulkan game engine. [MIT]</li>
<li><a href="http://liballeg.org/">Allegro</a> - A cross-platform library mainly aimed for video games and multimedia programming. [zlib]</li>
<li><a href="http://www.cocos2d-x.org/">Cocos2d-x</a> - A multi-platform framework for building 2d games, interactive books, demos and other graphical applications. [MIT]</li>
<li><a href="https://github.com/orangeduck/Corange">Corange</a> - A game engine written in pure C, SDL and OpenGL. [BSD]</li>
<li><a href="https://github.com/dbartolini/crown">crown</a> - Crown is a general purpose data-driven game engine, written from scratch in orthodox C++ with a minimalistic and data-oriented design philosophy in mind. [MIT]</li>
<li><a href="http://sourceforge.net/projects/delta3d/">delta3d</a> - A robust simulation platform. [LGPL2]</li>
<li><a href="https://github.com/skypjack/entt">EnTT</a> - Gaming meets modern C++. [MIT]</li>
<li><a href="https://github.com/gameplay3d/GamePlay">GamePlay</a> - A cross-platform native C++ game framework for creating 2D/3D mobile and desktop games. [Apache2]</li>
<li><a href="https://github.com/godotengine/godot">Godot</a> - A fully featured, open source, MIT licensed, game engine. [MIT]</li>
<li><a href="https://github.com/grit-engine/grit-engine">Grit</a> - Community project to build a free game engine for implementing open world 3D games. [MIT]</li>
<li><a href="https://github.com/amzeratul/halley">Halley</a> - A lightweight game engine written in C++14 with a “true” entity-component system. [Apache 2.0]</li>
<li><a href="https://github.com/gongminmin/KlayGE">KlayGE</a> - a cross-platform open source game engine with plugin-based architecture. [GPLv2] <a href="http://www.klayge.org/">website</a></li>
<li><a href="https://github.com/nCine/nCine">nCine</a> - A cross-platform 2D game engine with an emphasis on performance, written in C++11 and optionally scriptable in Lua. [MIT] <a href="https://ncine.github.io/">website</a></li>
<li><a href="https://github.com/o3de/o3de">o3de</a> - An open-source, real-time, multi-platform 3D engine based on Amazon Lumberyard. [Apache2] <a href="https://o3de.org/">website</a></li>
<li><a href="https://github.com/OpenXRay/xray-16">OpenXRay</a> - a community-modified X-Ray engine used in S.T.A.L.K.E.R. game series. [Modified BSD/non-commercial only]</li>
<li><a href="http://oxygine.org/">Oxygine</a> - A cross-platform 2D C++ game engine. [MIT]</li>
<li><a href="https://github.com/panda3d/panda3d">Panda3D</a> - A game engine, a framework for 3D rendering and game development for Python and C++ programs. [Modified BSD] <a href="https://www.panda3d.org/">website</a></li>
<li><a href="https://github.com/OneLoneCoder/olcPixelGameEngine">PixelGameEngine</a> - The official distribution of olcPixelGameEngine, a tool used in javidx9’s YouTube videos and projects. [OLC3]</li>
<li><a href="https://github.com/ivansafrin/Polycode">Polycode</a> - A cross-platform framework for creative code in C++ (with Lua bindings). [MIT] <a href="http://polycode.org/">website</a></li>
<li><a href="https://github.com/raysan5/raylib">raylib</a> - A simple and easy-to-use library to enjoy videogames programming. [zlib/libpng] <a href="http://www.raylib.com/">website</a></li>
<li><a href="https://github.com/spring/spring">Spring</a> - A powerful free cross-platform RTS game engine. [GPLv2/GPLv3] <a href="https://springrts.com/">website</a></li>
<li><a href="https://github.com/GarageGames/Torque2D">Torque2D</a> - An open-source and cross-platform C++ engine built for 2D game development. [MIT] <a href="https://www.garagegames.com/products/torque-2d">website</a></li>
<li><a href="https://github.com/GarageGames/Torque3D">Torque3D</a> - An open-source C++ engine built for 3D game development. [MIT] <a href="https://www.garagegames.com/products/torque-3d">website</a></li>
<li><a href="https://github.com/hugoam/toy">toy engine</a> - toy is a thin and modular c++ game engine and offers simple expressive c++ idioms to design full featured 2D or 3D games in fast iterations.</li>
<li><a href="https://urho3d.github.io/">Urho3D</a> - A free lightweight, cross-platform 2D and 3D game engine implemented in C++. Greatly inspired by OGRE and Horde3D. [MIT]</li>
</ul>
<h2 id="gui">GUI</h2>
<p><em>Graphic User Interface</em></p>
<ul>
<li><a href="https://github.com/AshampooSystems/boden">Boden</a> - Native, mobile, cross-platform GUI Framework. [GPL/LGPL/Commercial] <a href="https://www.boden.io">website</a></li>
<li><a href="http://cegui.org.uk/">CEGUI</a> - Flexible, cross-platform GUI library.</li>
<li><a href="https://github.com/cycfi/elements">Elements</a> - Lightweight, fine-grained, resolution independent, modular GUI library. [MIT]</li>
<li><a href="http://www.fltk.org/index.php">FLTK</a> - Fast, light, cross-platform C++ GUI toolkit. [GPL2]</li>
<li><a href="https://github.com/vczh-libraries/GacUI">GacUI</a> - GPU Accelerated C++ User Interface, with WYSIWYG developing tools, XML supports, built-in data binding and MVVM features. [Ms-PL]</li>
<li><a href="http://www.gtk.org/">GTK+</a> - A multi-platform toolkit for creating graphical user interfaces. [LGPL]</li>
<li><a href="http://www.gtkmm.org/en/">gtkmm</a> - The official C++ interface for the popular GUI library GTK+. [LGPL]</li>
<li><a href="https://github.com/ocornut/imgui">imgui</a> - Immediate Mode Graphical User Interface with minimal dependencies. [MIT]</li>
<li><a href="https://github.com/epezent/implot">implot</a> - Immediate Mode Plotting widgets for imgui. [MIT]</li>
<li><a href="https://www.tecgraf.puc-rio.br/iup">iup</a> - Multi-platform toolkit for building graphical user interfaces. [MIT]</li>
<li><a href="https://github.com/andlabs/libui">libui</a> - Simple and portable (but not inflexible) GUI library in C that uses the native GUI technologies of each platform it supports. [MIT]</li>
<li><a href="http://mygui.info/">MyGUI</a> - Fast, flexible and simple GUI. [MIT]</li>
<li><a href="http://nanapro.org/en-us/">nana</a> - Nana is a cross-platform library for GUI programming in modern C++ style. [Boost]</li>
<li><a href="https://github.com/mitsuba-renderer/nanogui">NanoGui</a> - A minimalistic cross-platform widget library for OpenGL 3.x or higher. [BSD]</li>
<li><a href="https://github.com/Immediate-Mode-UI/Nuklear">nuklear</a> - A single-header ANSI C gui library. [PublicDomain]</li>
<li><a href="http://qcustomplot.com/">QCustomPlot</a> - Qt plotting widget without further dependencies. [GPLv3]</li>
<li><a href="http://qwt.sourceforge.net/">Qwt</a> - Qt Widgets for Technical Applications. [Own based on LGPL]</li>
<li><a href="http://qwtplot3d.sourceforge.net/">QwtPlot3D</a> - A feature-rich Qt/OpenGL-based C++ programming library, providing essentially a bunch of 3D-widgets. [zlib]</li>
<li><a href="https://github.com/mikke89/RmlUi">RmlUi</a> - The HTML/CSS User Interface library evolved. Fork of libRocket. [MIT]</li>
<li><a href="http://sciter.com/">Sciter</a> - Sciter is an embeddable HTML/CSS/scripting engine aimed to be used as an UI layer of modern desktop applications. [Free/Commercial]</li>
<li><a href="http://wxwidgets.org/">wxWidgets</a> - A C++ library that lets developers create applications for Windows, Mac OS X, Linux and other platforms with a single code base. [Own LGPL]</li>
<li><a href="https://github.com/gammasoft71/xtd">xtd</a> - Modern C++17/20 framework to create console (CLI), forms (GUI like WinForms) and tunit (unit tests like Microsoft Unit Testing Framework) applications on Windows, macOS, Linux, iOS and android. [MIT]</li>
<li><a href="https://github.com/yue/yue">Yue</a> - A library for creating native cross-platform GUI apps. [LGPLv2]</li>
</ul>
<h2 id="graphics">Graphics</h2>
<ul>
<li><a href="https://github.com/assimp/assimp">assimp</a> - Open Asset Import Library (assimp) is a cross-platform 3D model import library which aims to provide a common API for different 3D asset file formats. [BSD-3-Clause] <a href="http://www.assimp.org">website</a></li>
<li><a href="https://github.com/bkaradzic/bgfx">bgfx</a> - A cross-platform rendering library. [BSD]</li>
<li><a href="https://github.com/blend2d/blend2d">Blend2D</a> - 2D vector graphics engine powered by a JIT compiler. [Zlib] <a href="https://blend2d.com/">website</a></li>
<li><a href="https://github.com/GameFoundry/bsf">bs::framework</a> - Modern C++14 library for the development of real-time graphical applications. [MIT]</li>
<li><a href="http://www.cairographics.org/">Cairo</a> - A 2D graphics library with support for multiple output devices. [LGPL2 or Mozilla MPL]</li>
<li><a href="https://github.com/walkerje/C-Turtle">C-Turtle</a> - A C++11 header-only turtle graphics library acting as a CImg wrapper. [MIT]</li>
<li><a href="https://github.com/DiligentGraphics/DiligentEngine">Diligent Engine</a> - A modern cross-platform low-level 3D graphics library. [Apache2]</li>
<li><a href="https://github.com/Microsoft/DirectXTK">DirectXTK</a> - A collection of helper classes for writing DirectX 11.x code in C++. [MIT]</li>
<li><a href="https://github.com/glfw/glfw">GLFW</a> - A simple, cross-platform OpenGL wrangling library. [zlib/libpng]</li>
<li><a href="https://github.com/kosua20/herebedragons">herebedragons</a> - A basic 3D scene implemented with various engines, frameworks or APIs. [MIT] <a href="http://simonrodriguez.fr/dragon/">website</a></li>
<li><a href="https://github.com/horde3d/Horde3D">Horde3D</a> - A small 3D rendering and animation engine. [EPL]</li>
<li><a href="https://github.com/google/ion">Ion</a> - A small and efficient set of libraries for building cross-platform client or server applications that use 3D graphics. [Apache2] <a href="https://google.github.io/ion/">website</a></li>
<li><a href="http://irrlicht.sourceforge.net/">Irrlicht</a> - A high performance realtime 3D engine written in C++. [zlib]</li>
<li><a href="https://github.com/libigl/libigl">libigl</a> - Simple C++ geometry processing library. [MPL2]</li>
<li><a href="https://github.com/LukasBanana/LLGL">LLGL</a> - Low Level Graphics Library (LLGL) is a thin abstraction layer for the modern graphics APIs. [BSD-3-Clause]</li>
<li><a href="https://github.com/mosra/magnum">magnum</a> - Lightweight and modular C++11/C++14 graphics middleware for games and data visualization. [MIT] <a href="http://magnum.graphics">website</a></li>
<li><a href="https://github.com/memononen/nanovg">NanoVG</a> - Antialiased 2D vector drawing library on top of OpenGL for UI and visualizations. [Zlib]</li>
<li><a href="http://www.ogre3d.org/">Ogre 3D</a> :zap: - A scene-oriented, real-time, flexible 3D rendering engine (as opposed to a game engine) written in C++. [MIT]</li>
<li><a href="http://www.openscenegraph.org/">OpenSceneGraph</a> - An open source high performance 3D graphics toolkit. [OSGPL]</li>
<li><a href="https://github.com/PixarAnimationStudios/OpenSubdiv">OpenSubdiv</a> - Pixar’s library for evaluating and rendering subdivision surfaces on CPU and GPU. [Modified Apache2]</li>
<li><a href="http://www.openvdb.org/">OpenVDB</a> - Library and tools for storing, editing, and rendering volumetric datasets. [MPL2]</li>
<li><a href="http://www.panda3d.org/">Panda3D</a> - A framework for 3D rendering and game development for Python and C++. [BSD]</li>
<li><a href="https://github.com/wdas/partio">Partio</a> - Library for wrangling particle data, with support for most common file formats. [Modified BSD]</li>
<li><a href="https://github.com/google/skia">Skia</a> - A complete 2D graphic library for drawing Text, Geometries, and Images. [BSD] <a href="https://sites.google.com/site/skiadocs/home">webpage</a></li>
<li><a href="https://github.com/msteinbeck/tinyspline">TinySpline</a> - A small, yet powerful ANSI C library for interpolating, transforming, and querying arbitrary NURBS, B-Splines, and Bézier curves. [MIT]</li>
<li><a href="https://github.com/urho3d/Urho3D">urho3d</a> - Cross-platform rendering and game engine. [Many different, mostly MIT]</li>
<li><a href="https://github.com/xelatihy/yocto-gl">Yocto/GL</a> - Tiny C++ Libraries for Data-Driven Physically-based Graphics. [MIT]</li>
</ul>
<h2 id="image-processing">Image Processing</h2>
<ul>
<li><a href="http://www.boost.org/doc/libs/1_56_0/libs/gil/doc/index.html">Boost.GIL</a> - Generic Image Library.</li>
<li><a href="http://cimg.eu/">CImg</a> - A small, open source, C++ toolkit for image processing. [Own LGPL or GPL]</li>
<li><a href="https://www.codeproject.com/Articles/1300/CxImage">CxImage</a> - An image processing and conversion library to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images. [zlib]</li>
<li><a href="https://github.com/davisking/dlib">Dlib</a> :zap: - A modern C++11 machine learning, computer vision, numerical optimization, and deep learning toolkit. [Boost] <a href="http://dlib.net/">website</a></li>
<li><a href="http://freeimage.sourceforge.net/">FreeImage</a> - An open source library that supports popular graphics image formats and others as needed by today’s multimedia applications. [GPL2 or GPL3]</li>
<li><a href="https://github.com/libgd/libgd">GD</a> - GD Graphics Library, famously used in PHP for image loading/manipulation & thumbnail generation. [custom permissive license, requires mention in user docs] <a href="http://libgd.github.io/">website</a></li>
<li><a href="http://dicom.offis.de/dcmtk.php.en">DCMTK</a> - DICOM Toolkit.</li>
<li><a href="http://gdcm.sourceforge.net/wiki/index.php/Main_Page">GDCM</a> - Grassroots DICOM library.</li>
<li><a href="http://www.itk.org/">ITK</a> - An open-source, cross-platform system for image analysis. [Apache2 from ITK 4.0]</li>
<li><a href="https://github.com/DanBloomberg/leptonica">Leptonica</a> - Leptonica is an open source library containing software that is broadly useful for image processing and image analysis applications. [BSD-2-Clause] <a href="http://leptonica.org/index.html">website</a></li>
<li><a href="https://github.com/ShiqiYu/libfacedetection">libfacedetection</a> - Open source library for face detection in images. The face detection speed can reach 1500FPS. [BSD]</li>
<li><a href="https://github.com/libjpeg-turbo/libjpeg-turbo">libjpeg-turbo</a> - A JPEG image codec that uses SIMD instructions to accelerate baseline JPEG encoding and decoding. [IJG & BSD-3-Clause & zlib] <a href="https://libjpeg-turbo.org/">website</a></li>
<li><a href="https://github.com/jcupitt/libvips">libvips</a> - A fast image processing library with low memory needs. [LGPL] <a href="http://www.vips.ecs.soton.ac.uk/">website</a></li>
<li><a href="https://imagemagick.org/script/magick++.php">Magick++</a> - ImageMagick program interfaces for C++. [Apache2]</li>
<li><a href="https://imagemagick.org/script/magick-wand.php">MagickWnd</a> - ImageMagick program interfaces for C. [Apache2]</li>
<li><a href="http://opencv.org/">OpenCV</a> :zap: - Open source computer vision. [BSD]</li>
<li><a href="http://www.openexr.com/">OpenEXR</a> - Cross-platform library for high dynamic range imaging. [Modified BSDF]</li>
<li><a href="https://github.com/OpenImageIO/oiio">OpenImageIO</a> - Powerful image and texture wrangling library with support for a wide number of common lossy and RAW formats. [Modified BSD]</li>
<li><a href="https://github.com/happy-sea-fox/sail">SAIL</a> - Easy-to-use cross-platform image decoding library with pluggable image codecs. [MIT]</li>
<li><a href="https://github.com/ermig1979/Simd">Simd</a> - C++ image processing library with using of SIMD: SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, VMX(Altivec) and VSX(Power7), NEON for ARM. [MIT]</li>
<li><a href="https://github.com/nothings/stb/blob/master/stb_image.h">stb-image</a> - STB single-header image loading library. [Public Domain]</li>
<li><a href="https://github.com/tesseract-ocr">tesseract-ocr</a> - An OCR engine. [Apache2]</li>
<li><a href="https://github.com/cdcseacave/TinyEXIF">TinyEXIF</a> - Tiny ISO-compliant C++ EXIF and XMP parsing library for JPEG. [MIT]</li>
<li><a href="https://github.com/matt-42/vpp">Video++</a> - A C++14 high performance video and image processing library. [MIT]</li>
<li><a href="https://github.com/ukoethe/vigra">VIGRA</a> - A generic C++ computer vision library for image analysis. [MIT X11]</li>
<li><a href="http://www.vtk.org/">VTK</a> - Open-source, freely available software system for 3D computer graphics, image processing and visualization. [BSD]</li>
</ul>
<h2 id="internationalization">Internationalization</h2>
<ul>
<li><a href="http://www.gnu.org/software/gettext/">gettext</a> - GNU ‘gettext’. [GPL2]</li>
<li><a href="http://site.icu-project.org/">IBM ICU</a> - A set of C/C++ and Java libraries providing Unicode and Globalization support. [ICU]</li>
<li><a href="http://www.gnu.org/software/libiconv/">libiconv</a> - An encoding conversion library between different character encodings. [GPL]</li>
<li><a href="https://github.com/sheredom/utf8.h">utf8.h</a> - Single header utf8 string functions for C and C++. [Unlicense]</li>
<li><a href="https://github.com/JuliaStrings/utf8proc">utf8proc</a> - A clean C library for processing UTF-8 Unicode data. [MIT]</li>
</ul>
<h2 id="inter-process-communication">Inter-process communication</h2>
<ul>
<li><a href="https://thrift.apache.org/">Apache Thrift</a> - Efficient cross-language IPC/RPC, works between C++, Java, Python, PHP, C#, and many more other languages. Originally developed by Facebook. [Apache2]</li>
<li><a href="https://github.com/capnproto/capnproto">Cap’n Proto</a> - Fast data interchange format and capability-based RPC system. [MIT] <a href="https://capnproto.org/">website</a></li>
<li><a href="https://github.com/continental/ecal">eCAL</a> - Pub/sub, client/server, C++/Python/C#, various message protocols (protobuf, capnproto ..). [Apache2] <a href="http://www.ecal.io/">website</a></li>
<li><a href="https://github.com/grpc/grpc">gRPC</a> - A high performance, open source, general-purpose RPC framework. [BSD] <a href="http://www.grpc.io/">website</a></li>
<li><a href="https://github.com/zeroc-ice/ice">Ice</a> - Comprehensive RPC framework with support for C++, C#, Java, JavaScript, Python and more. [GPLv2]</li>
<li><a href="https://github.com/cinemast/libjson-rpc-cpp">libjson-rpc-cpp</a> - JSON-RPC framework for C++ servers and clients. [MIT]</li>
<li><a href="https://github.com/nanomsg/nanomsg">nanomsg</a> - A simple high-performance implementation of several “scalability protocols”. [MIT] <a href="http://nanomsg.org/">website</a></li>
<li><a href="https://github.com/nanomsg/nng">nng</a> - nanomsg-next-generation, a light-weight brokerless messaging library. [MIT] <a href="https://nanomsg.github.io/nng/">website</a></li>
<li><a href="https://github.com/rpclib/rpclib">rpclib</a> - A modern C++ msgpack-RPC server and client library. [MIT]</li>
<li><a href="https://github.com/pearu/simple-rpc-cpp">simple-rpc-cpp</a> - A simple RPC wrapper generator to C/C++ functions. [BSD]</li>
<li><a href="http://wamp.ws/">WAMP</a> - Provides RPC and pub/sub messaging patterns. (various implementations, various languages)</li>
<li><a href="http://xmlrpc-c.sourceforge.net/">xmlrpc-c</a> - A lightweight RPC library based on XML and HTTP. [BSD]</li>
</ul>
<h2 id="json">JSON</h2>
<ul>
<li><a href="http://www.boost.org/doc/libs/1_55_0/doc/html/property_tree.html">Boost.PropertyTree</a> - A property tree parser/generator that can be used to parse XML/JSON/INI/Info files. [Boost]</li>
<li><a href="https://github.com/DaveGamble/cJSON">cJSON</a> - Ultralightweight JSON parser in ANSI C. [MIT]</li>
<li><a href="https://github.com/cesanta/frozen">frozen</a> - JSON parser and generator for C/C++. [GPL & GPL2]</li>
<li><a href="https://github.com/akheron/jansson">Jansson</a> - C library for encoding, decoding and manipulating JSON data. [MIT]</li>
<li><a href="https://github.com/chrismanning/jbson">jbson</a> - jbson is a library for building & iterating BSON data, and JSON documents in C++14. [Boost]</li>
<li><a href="https://github.com/jeaye/jeayeson">JeayeSON</a> - A very sane (header only) C++ JSON library. [BSD]</li>
<li><a href="https://github.com/zserge/jsmn">Jsmn</a> - A minimalistic JSON parser in C. [MIT]</li>
<li><a href="https://github.com/nlohmann/json">json</a> :zap: - JSON for Modern C++. [MIT]</li>
<li><a href="https://github.com/hjiang/jsonxx">JSON++</a> - A JSON parser in C++. [MIT]</li>
<li><a href="https://github.com/sheredom/json.h">json.h</a> - A simple one header/one source solution to parsing JSON in C and C++. [Unlicense]</li>
<li><a href="https://github.com/json-c/json-c">json-c</a> - A JSON implementation in C. [MIT]</li>
<li><a href="https://github.com/danielaparker/jsoncons">jsoncons</a> - A C++ header-only library for JSON and JSON-like binary formats with JSONPointer, JSONPatch, JSONPath and JMESPath. [Boost]</li>
<li><a href="https://github.com/open-source-parsers/jsoncpp">JsonCpp</a> - A C++ library for interacting with JSON. [MIT]</li>
<li><a href="https://github.com/udp/json-parser">json-parser</a> - Very low footprint JSON parser written in portable ANSI C. [BSD]</li>
<li><a href="https://github.com/dropbox/json11">json11</a> - A tiny JSON library for C++11. [MIT]</li>
<li><a href="https://github.com/jorgen/json_struct">json-struct</a> - High performance, single header JSON parser parsing to and from C++ structs. [MIT]</li>
<li><a href="https://github.com/tgockel/json-voorhees">json-voorhees</a> - JSON library for C++. Support for C++11. No dependencies, fast and dev-friendly. [Apache2]</li>
<li><a href="https://github.com/amir-s/jute">jute</a> - Very simple C++ JSON Parser. [PublicDomain]</li>
<li><a href="https://github.com/vincenthz/libjson">libjson</a> - A JSON parser and printer library in C. easy to integrate with any model. [LGPL]</li>
<li><a href="http://sourceforge.net/projects/libjson/">libjson</a> - Lightweight JSON library. [?]</li>
<li><a href="https://github.com/vstakhov/libucl">LIBUCL</a> :zap: - Universal configuration library parser [BSD-2-Clause]</li>
<li><a href="https://github.com/kgabis/parson">parson</a> - Parson is a lighweight json library written in C. [MIT]</li>
<li><a href="https://github.com/kazuho/picojson">PicoJSON</a> - A header-file-only, JSON parser serializer in C++. [BSD]</li>
<li><a href="https://github.com/gaudecker/qt-json">qt-json</a> - A simple class for parsing JSON data into a QVariant hierarchy and vice versa. [GPLv3]</li>
<li><a href="https://github.com/flavio/qjson">QJson</a> - A qt-based library that maps JSON data to QVariant objects. [LGPL2]</li>
<li><a href="https://github.com/miloyip/rapidjson">RapidJSON</a> :zap: - A fast JSON parser/generator for C++ with both SAX/DOM style API. [MIT]</li>
<li><a href="https://github.com/chadaustin/sajson">sajson</a> - Lightweight, extremely high-performance JSON parser for C++11. [MIT]</li>
<li><a href="https://github.com/lemire/simdjson">simdjson</a> - Extremely fast JSON library that can parse gigabytes of JSON per second. [Apache-2.0]</li>
<li><a href="https://github.com/taocpp/json">taoJSON</a> - Zero-dependency C++ header-only JSON library. [MIT]</li>
<li><a href="https://bitbucket.org/awangk/ujson">ujson</a> - µjson is a a small, C++11, UTF-8, JSON library. [MIT]</li>
<li><a href="https://github.com/lloyd/yajl">YAJL</a> - A fast streaming JSON parsing library in C. [ISC]</li>
<li><a href="https://github.com/ibireme/yyjson">yyjson</a> - A high performance JSON library written in ANSI C. [MIT]</li>
</ul>
<h2 id="logging">Logging</h2>
<ul>
<li><a href="https://github.com/3Hren/blackhole">Blackhole</a> - Attribute-based logging framework, which is designed to be fast, modular and highly customizable. [MIT]</li>
<li><a href="http://www.boost.org/doc/libs/1_56_0/libs/log/doc/html/index.html">Boost.Log</a> - Designed to be very modular and extensible. [Boost]</li>
<li><a href="https://github.com/amrayn/easyloggingpp">Easylogging++</a> - Extremely light-weight high performance logging library for C++11 (or higher) applications. [MIT]</li>
<li><a href="https://github.com/MengRao/fmtlog">fmtlog</a> - A performant fmtlib-style logging library with latency in nanoseconds. [MIT]</li>
<li><a href="https://github.com/KjellKod/g3log">G3log</a> - Asynchronous logger with Dynamic Sinks. [PublicDomain]</li>
<li><a href="https://github.com/google/glog">glog</a> - C++ implementation of the Google logging module.</li>
<li><a href="http://log4cpp.sourceforge.net/">Log4cpp</a> - A library of C++ classes for flexible logging to files, syslog, IDSA and other destinations. [LGPL]</li>
<li><a href="https://github.com/log4cplus/log4cplus">log4cplus</a> - A simple to use C++ logging API providing thread-safe, flexible, and arbitrarily granular control over log management and configuration. [BSD & Apache2]</li>
<li><a href="https://github.com/emilk/loguru">loguru</a> - A lightweight C++ logging library. [PublicDomain]</li>
<li><a href="https://github.com/SergiusTheBest/plog">plog</a> - Portable and simple log for C++ in less than 1000 lines of code. [MPL2]</li>
<li><a href="https://github.com/mattiasflodin/reckless">reckless</a> - Low-latency, high-throughput, asynchronous logging library for C++. [MIT]</li>
<li><a href="https://github.com/gabime/spdlog">spdlog</a> - Super fast, header only, C++ logging library.</li>
<li><a href="http://www.templog.org/">templog</a> - A very small and lightweight C++ library which you can use to add logging to your C++ applications. [Boost]</li>
<li><a href="http://baical.net/p7.html">P7Baical</a> - An open source and cross-platform library for high-speed sending telemetry & trace data with minimal usage of CPU and memory. [LGPL]</li>
<li><a href="https://github.com/odygrd/quill">Quill</a> - Asynchronous cross platform low latency logging library. [MIT]</li>
</ul>
<h2 id="machine-learning">Machine Learning</h2>
<ul>
<li><a href="https://github.com/BVLC/caffe">Caffe</a> - A fast framework for neural networks. [BSD]</li>
<li><a href="https://github.com/liuliu/ccv">CCV</a> - C-based/Cached/Core Computer Vision Library, A Modern Computer Vision Library. [BSD]</li>
<li><a href="https://github.com/pjreddie/darknet">darknet</a> - Open source neural network framework written in C and CUDA. [PublicDomain] <a href="https://pjreddie.com/darknet/">website</a></li>
<li><a href="https://github.com/davisking/dlib">Dlib</a> :zap: - A modern C++11 machine learning, computer vision, numerical optimization, and deep learning toolkit. [Boost] <a href="http://dlib.net/">website</a></li>
<li><a href="https://github.com/FidoProject/Fido">Fido</a> - A highly-modular C++ machine learning library for embedded electronics and robotics. [MIT] <a href="http://fidoproject.github.io/">website</a></li>
<li><a href="https://github.com/facebookresearch/flashlight">flashlight</a> - A fast, flexible machine learning library from Facebook AI Research written entirely in C++ and based on the ArrayFire tensor library. [BSD-3-Clause] <a href="https://fl.readthedocs.io/en/latest/">website</a></li>
<li><a href="https://github.com/cjlin1/libsvm">libsvm</a> - A simple, easy-to-use, efficient library for Support Vector Machines. [BSD-3-Clause] <a href="https://www.csie.ntu.edu.tw/~cjlin/libsvm/">website</a></li>
<li><a href="https://github.com/BayesWitnesses/m2cgen">m2cgen</a> - A CLI tool to transpile trained classic ML models into a native C code with zero dependencies. [MIT]</li>
<li><a href="https://github.com/meta-toolkit/meta">MeTA</a> - A modern C++ data sciences toolkit. [MIT] <a href="https://meta-toolkit.org/">website</a></li>
<li><a href="https://github.com/dmlc/minerva">Minerva</a> - A fast and flexible system for deep learning. [Apache2]</li>
<li><a href="https://github.com/mlpack/mlpack">mlpack</a> - A scalable c++ machine learning library. [LGPLv3] <a href="http://www.mlpack.org/">website</a></li>
<li><a href="https://github.com/Itseez/opencv">OpenCV</a> :zap: - Open Source Computer Vision Library. [BSD] <a href="http://opencv.org/">website</a></li>
<li><a href="https://github.com/oneapi-src/oneDAL">oneDAL</a> - A powerful machine learning library that helps speed up big data analysis. [Apache]</li>
<li><a href="https://github.com/GHamrouni/Recommender">Recommender</a> - C library for product recommendations/suggestions using collaborative filtering (CF). [BSD]</li>
<li><a href="https://github.com/szcom/rnnlib">RNNLIB</a> - RNNLIB is a recurrent neural network library for sequence learning problems. [GPLv3]</li>
<li><a href="https://github.com/shogun-toolbox/shogun">SHOGUN</a> - The Shogun Machine Learning Toolbox. [GPLv3]</li>
<li><a href="https://code.google.com/p/sofia-ml/">sofia-ml</a> - The suite of fast incremental algorithms for machine learning. [Apache2]</li>
<li><a href="https://github.com/vlfeat/vlfeat">VLFeat</a> - The VLFeat open source library implements popular computer vision algorithms specialising in image understanding and local featurexs extraction and matching. [BSD-2-Clause] <a href="http://www.vlfeat.org/">website</a></li>
<li><a href="https://github.com/dmlc/xgboost">xgboost</a> - Scalable, Portable and Distributed Gradient Boosting (GBDT, GBRT or GBM) Library, for Python, R, Java, Scala, C++ and more. Runs on single machine, Hadoop, Spark, Flink and DataFlow. [Apache2]</li>
<li><a href="https://github.com/Tencent/ncnn">ncnn</a> - A high-performance neural network inference computing framework optimized for mobile platforms. [BSD]</li>
</ul>
<h2 id="math">Math</h2>
<ul>
<li><a href="https://github.com/b-k/apophenia">Apophenia</a> - A C library for statistical and scientific computing [GPL2]</li>
<li><a href="https://gitlab.com/conradsnicta/armadillo-code">Armadillo</a> - Fast C++ library for linear algebra & scientific computing. [Apache2] <a href="http://arma.sourceforge.net/">website</a></li>
<li><a href="https://github.com/autodiff/autodiff">autodiff</a> - A modern, fast and expressive C++ library for automatic differentiation. [MIT] <a href="https://autodiff.github.io">website</a></li>
<li><a href="https://bitbucket.org/blaze-lib/blaze">blaze</a> - high-performance C++ math library for dense and sparse arithmetic. [BSD]</li>
<li><a href="http://www.boost.org/doc/libs/master/libs/multiprecision/doc/html/index.html">Boost.Multiprecision</a> - provides higher-range/precision integer, rational and floating-point types in C++, header-only or with GMP/MPFR/LibTomMath backends. [Boost]</li>
<li><a href="http://ceres-solver.org/">ceres-solver</a> - C++ library for modeling and solving large complicated nonlinear least squares problems from google. [BSD]</li>
<li><a href="https://github.com/CGAL/cgal">CGAL</a> - Collection of efficient and reliable geometric algorithms. [LGPL&GPL] <a href="http://www.cgal.org/">website</a></li>
<li><a href="http://cmldev.net/">cml</a> - free C++ math library for games and graphics. [Boost]</li>
<li><a href="https://github.com/johnmcfarlane/cnl/">CNL</a> - A Compositional Numeric Library for C++. [Boost]</li>
<li><a href="https://github.com/ZigRazor/CXXGraph">CXXGraph</a> - free C++(17) graph header-only library for representation and algorithms execution. [AGPL-3.0]</li>
<li><a href="https://github.com/davisking/dlib">Dlib</a> :zap: - A modern C++11 machine learning, computer vision, numerical optimization, and deep learning toolkit. [Boost] <a href="http://dlib.net/">website</a></li>
<li><a href="http://eigen.tuxfamily.org/">Eigen</a> - A high-level C++ library of template headers for linear algebra, matrix and vector operations, numerical solvers and related algorithms. [MPL2]</li>
<li><a href="http://www.partow.net/programming/exprtk/">ExprTK</a> - The C++ Mathematical Expression Toolkit Library (ExprTk) is a simple to use, easy to integrate and extremely efficient run-time mathematical expression parser and evaluation engine. [MIT]</li>
<li><a href="https://www.geometrictools.com">Geometric Tools</a> - C++ library for computing in the fields of mathematics, graphics, image analysis and physics. [Boost] <a href="https://www.geometrictools.com">website</a></li>
<li><a href="https://github.com/g-truc/glm">GLM</a> - Header-only C++ math library that matches and inter-operates with OpenGL’s GLSL math. [MIT] <a href="https://glm.g-truc.net/">website</a></li>
<li><a href="http://ggt.sourceforge.net/">GMTL</a> - Graphics Math Template Library is a collection of tools implementing Graphics primitives in generalized ways. [GPL2]</li>
<li><a href="https://gmplib.org/">GMP</a> - A C library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating-point numbers. [LGPL3 & GPL2]</li>
<li><a href="https://github.com/jeremyong/klein">Klein</a> - A fast, SIMD-optimized C++17 Geometric Algebra library for point, line, and plane projections, intersections, joins, rigid-body motion, and more. [MIT] <a href="https://jeremyong.com/klein">website</a></li>
<li><a href="https://github.com/sgorsten/linalg">linalg.h</a> - Single header, public domain, short vector math library for C++. [Unlicense]</li>
<li><a href="https://github.com/CertiVox/MIRACL">MIRACL</a> - A Multiprecision Integer and Rational Arithmetic Cryptographic Library. [AGPL]</li>
<li><a href="https://github.com/dpilger26/NumCpp">NumCpp</a> - A templatized header only C++ implementation of the Python Numpy library. [MIT]</li>
<li><a href="http://beltoforion.de/article.php?a=muparser">muparser</a> - muParser is an extensible high performance math expression parser library written in C++. [MIT]</li>
<li><a href="https://github.com/libtom/libtommath">LibTomMath</a> - A free open source portable number theoretic multiple-precision integer library written entirely in C. [PublicDomain & WTFPL] <a href="http://www.libtom.net/">website</a></li>
<li><a href="https://github.com/datenwolf/linmath.h">linmath.h</a> - A lean linear math library, aimed at graphics programming. [WTFPL]</li>
<li><a href="https://sourceforge.net/projects/lpsolve">lp_solve</a> - A library used to formulate and solve linear programming problems. [LGPL] <a href="http://lpsolve.sourceforge.net">website</a></li>
<li><a href="https://github.com/xianyi/OpenBLAS">OpenBLAS</a> - An optimized BLAS library based on GotoBLAS2 1.13 BSD version. [BSD 3-clause] <a href="http://www.openblas.net/">website</a></li>
<li><a href="https://www.pcg-random.org/">PCG-rand</a> - PCG is a family of simple fast space-efficient statistically good algorithms for random number generation. Unlike many general-purpose RNGs, they are also hard to predict. [Apache]</li>
<li><a href="https://github.com/lballabio/quantlib">QuantLib</a> - A free/open-source library for quantitative finance. [Modified BSD] <a href="http://quantlib.org/">website</a></li>
<li><a href="https://github.com/kthohr/stats">StatsLib</a> - A C++ header-only library of statistical distribution functions. [Apache2] <a href="https://www.kthohr.com/statslib.html">website</a></li>
<li><a href="https://github.com/symengine/symengine">SymEngine</a> - Fast symbolic manipulation library, a rewriting of SymPy’s core in C++. [MIT]</li>
<li><a href="https://github.com/codeplea/tinyexpr">TinyExpr</a> - A C library for parsing and evaluating math expressions from strings. [zlib]</li>
<li><a href="https://github.com/VcDevel/Vc">Vc</a> - SIMD Vector Classes for C++. [BSD]</li>
<li><a href="http://versor.mat.ucsb.edu/">Versor</a> - A (fast) Generic C++ library for Geometric Algebras, including Euclidean, Projective, Conformal, Spacetime (etc).</li>
<li><a href="http://www.wykobi.com/">Wykobi</a> - A C++ library of efficient, robust and simple to use C++ 2D/3D oriented computational geometry routines. [MIT]</li>
<li><a href="https://github.com/xtensor-stack/xtensor">xtensor</a> - A C++14 library for numerical analysis with multi-dimensional array expressions, inspired by NumPy syntax. [BSD 3-clause] <a href="https://xtensor-stack.github.io/xtensor">website</a></li>
<li><a href="https://github.com/stillwater-sc/universal">universal</a> - A C++14 header-only library implementing arbitrary posit arithmetic. The posit number system is a tapered floating point that is more efficient than IEEE floating point. Posits enable reproducible computational science. [MIT license] <a href="http://www.stillwater-sc.com/assets/content/stillwater-universal-sw.html">website</a></li>
</ul>
<h2 id="memory-allocation">Memory Allocation</h2>
<ul>
<li><a href="https://github.com/ivmai/bdwgc">Boehm GC</a> - Conservative garbage collector for C and C++. [similar to X11] <a href="http://www.hboehm.info/gc/">website</a></li>
<li><a href="https://github.com/Snaipe/libcsptr">C Smart Pointers</a> - Smart pointers for the (GNU) C programming language. [MIT]</li>
<li><a href="https://github.com/emeryberger/Hoard">Hoard</a> - Fast, Scalable, and Memory-efficient Malloc for Linux, Windows, and Mac. [GPL, commercial] <a href="http://hoard.org/">website</a></li>
<li><a href="https://github.com/jemalloc/jemalloc">jemalloc</a> - General purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. [BSD] <a href="http://jemalloc.net/">website</a></li>
<li><a href="https://github.com/foonathan/memory">memory</a> - STL compatible C++ memory allocator library. [ZLib]</li>
<li><a href="https://github.com/mtrebi/memory-allocators">memory-allocators</a> - Custom memory allocators to improve the performance of dynamic memory allocation. [MIT]</li>
<li><a href="https://github.com/microsoft/mimalloc">mimalloc</a> - A compact general purpose allocator with excellent performance. [MIT]</li>
<li><a href="https://github.com/mjansson/rpmalloc">rpmalloc</a> - Cross platform lock free thread caching 16-byte aligned memory allocator implemented in C. [PublicDomain]</li>
<li><a href="https://github.com/microsoft/snmalloc">snmalloc</a> - Message passing based high-performance allocator. [MIT]</li>
<li><a href="https://github.com/google/tcmalloc">TCMalloc</a> - Google’s fast, multi-threaded malloc implementation. [Apache-2.0] <a href="https://google.github.io/tcmalloc/">website</a></li>
<li><a href="https://github.com/orangeduck/tgc">tgc</a> - A tiny garbage collector for C written in ~500 LOC. [BSD]</li>
</ul>
<h2 id="multimedia">Multimedia</h2>
<ul>
<li><a href="http://gstreamer.freedesktop.org/">GStreamer</a> - A library for constructing graphs of media-handling components. [LGPL]</li>
<li><a href="https://github.com/libass/libass">libass</a> - Portable subtitle renderer for the ASS/SSA subtitle format. [ISC]</li>
<li><a href="https://github.com/libav/libav">libav</a> - A collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata. [LGPL v2.1+ and others] <a href="https://www.libav.org/">website</a></li>
<li><a href="http://www.live555.com/liveMedia/">LIVE555 Streaming Media</a> - Multimedia streaming library using open standard protocols (RTP/RTCP, RTSP, SIP). [LGPL]</li>
<li><a href="https://wiki.videolan.org/LibVLC">libVLC</a> - libVLC (VLC SDK) media framework. [GPL]</li>
<li><a href="https://github.com/MediaArea/MediaInfoLib">MediaInfoLib</a> - Convenient unified display of the most relevant technical and tag data for video and audio files. [BSD]</li>
<li><a href="https://github.com/wang-bin/QtAV">QtAv</a> - A multimedia playback framework based on Qt and FFmpeg to write a player easily. [LGPL] <a href="http://wang-bin.github.io/QtAV/">website</a></li>
<li><a href="http://www.libsdl.org/">SDL</a> :zap: - Simple DirectMedia Layer. [zlib]</li>
<li><a href="https://github.com/SFML/SFML">SFML</a> :zap: - Simple and Fast Multimedia Library. [zlib] <a href="http://www.sfml-dev.org/">website</a></li>
<li><a href="https://github.com/taglib/taglib">TagLib</a> - A library for reading and editing the metadata of several popular audio formats. [LGPL/MPL] <a href="https://taglib.org/">website</a></li>
</ul>
<h2 id="networking">Networking</h2>
<ul>
<li><a href="http://www.dre.vanderbilt.edu/~schmidt/ACE.html">ACE</a> - An OO Network Programming Toolkit in C++. [?MIT?]</li>
<li><a href="http://think-async.com/">Boost.Asio</a> :zap: - A cross-platform C++ library for network and low-level I/O programming. [Boost]</li>
<li><a href="https://github.com/boostorg/beast">Boost.Beast</a> :zap: - HTTP and WebSocket built on Boost.Asio in C++11. [BSL-1.0] <a href="https://www.boost.org/libs/beast">website</a></li>
<li><a href="https://github.com/Organic-Code/Breep">Breep</a> - Event based, high-level C++14 peer-to-peer library. [EUPL-1.1 (OSI approved)]</li>
<li><a href="https://github.com/Microsoft/cpprestsdk">C++ REST SDK</a> - C++ REST SDK (previously named Casablanca). [Apache2]</li>
<li><a href="https://github.com/corvusoft/restbed">Restbed</a> - C++11 Asynchronous RESTful framework. [AGPL]</li>
<li><a href="https://github.com/Stiffstream/restinio">Restinio</a> - A header-only C++14 library that gives you an embedded HTTP/Websocket server. [BSD]</li>
<li><a href="https://github.com/c-ares/c-ares">c-ares</a> - A C library for asynchronous DNS requests. [MIT]</li>
<li><a href="https://github.com/yhirose/cpp-httplib">cpp-httplib</a> - A single file C++11 header-only HTTP/HTTPS server library. [MIT]</li>
<li><a href="http://cpp-netlib.org/">cpp-netlib</a> - A collection of open-source libraries for high level network programming. [Boost]</li>
<li><a href="https://github.com/cpp-netlib/uri">cpp-netlib/uri</a> - URI parser/builder library for C++, compatible with RFC 3986 and RFC 3987. [BSL-1.0]</li>
<li><a href="https://github.com/chronoxor/CppServer">CppServer</a> - Ultra fast and low latency asynchronous socket server & client C++ library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution. [MIT]</li>
<li><a href="https://github.com/whoshuu/cpr">cpr</a> - A modern C++ HTTP requests library with a simple but powerful interface. Modeled after the Python Requests module. [MIT] <a href="https://whoshuu.github.io/cpr/">website</a></li>
<li><a href="https://github.com/JosephP91/curlcpp">curlcpp</a> - An object oriented C++ wrapper for CURL(libcurl). [MIT]</li>
<li><a href="https://github.com/DPDK/dpdk">DPDK</a> - Data Plane Development Kit, libraries and drivers for fast packet processing. [BSD-3-Clause & GPL-2.0] <a href="https://www.dpdk.org/">website</a></li>
<li><a href="https://github.com/rxi/dyad">Dyad.c</a> - Asynchronous networking for C. [MIT]</li>
<li><a href="https://github.com/lsalzman/enet">ENet</a> - Reliable UDP networking library. [MIT] <a href="http://enet.bespin.org/">website</a></li>
<li><a href="https://github.com/Qihoo360/evpp">evpp</a> - C++ high performance networking with TCP/UDP/HTTP protocols. [BSD]</li>
<li><a href="https://github.com/h2o/h2o">H2O</a> - An optimized HTTP server with support for HTTP/1.x and HTTP/2. It can also be used as a library. [MIT]</li>
<li><a href="https://github.com/nodejs/http-parser">HTTP Parser</a> :zap: - A http request/response parser for C. [MIT]</li>
<li><a href="https://github.com/skywind3000/kcp/blob/master/README.en.md">KCP</a> - A fast and reliable ARQ protocol that helps applications to reduce network latency. [MIT]</li>
<li><a href="http://curl.haxx.se/libcurl/">libcurl</a> - Multiprotocol file transfer library. [MIT/X derivate license]</li>
<li><a href="https://github.com/etr/libhttpserver">libhttpserver</a> - C++ library for creating an embedded Rest HTTP server (and more). [LGPL2.1]</li>
<li><a href="http://www.gnu.org/software/libmicrohttpd/">Libmicrohttpd</a> - GNU libmicrohttpd is a small C library that is supposed to make it easy to run an HTTP server as part of another application. [LGPL v2.1+]</li>
<li><a href="https://github.com/the-tcpdump-group/libpcap">libpcap</a> - A portable C/C++ library for network traffic capture. [BSD] <a href="https://www.tcpdump.org/">website</a></li>
<li><a href="https://github.com/devsisters/libquic">libquic</a> - A QUIC protocol library extracted from Chromium’s QUIC Implementation. [BSD]</li>
<li><a href="https://github.com/edenhill/librdkafka">librdkafka</a> - Apache Kafka client library for C and C++. [BSD-2-Clause]</li>
<li><a href="https://github.com/warmcat/libwebsockets">libwebsockets</a> - A lightweight pure C WebSocket implementation that provides both client and server libraries. [LGPL2.1 + static link exception] <a href="https://libwebsockets.org/">website</a></li>
<li><a href="http://savannah.nongnu.org/projects/lwip/">lwIP</a> - A lightweight TCP/IP stack. [Modified BSD]</li>
<li><a href="https://github.com/cesanta/mongoose">Mongoose</a> - Extremely lightweight webserver. [GPL2]</li>
<li><a href="https://github.com/LiamBindle/MQTT-C">MQTT-C</a> - A portable MQTT C client for embedded systems and PCs alike. [MIT] <a href="https://liambindle.ca/MQTT-C">website</a></li>
<li><a href="https://github.com/mtcp-stack/mtcp">mTCP</a> - Highly scalable user-level TCP stack for multicore systems. [Modified BSD]</li>
<li><a href="https://github.com/chenshuo/muduo">Muduo</a> - A C++ non-blocking network library for multi-threaded server in Linux. [BSD]</li>
<li><a href="https://github.com/nghttp2/nghttp2">nghttp2</a> - HTTP/2 C Library. [MIT] <a href="https://nghttp2.org/">website</a></li>
<li><a href="https://github.com/davidmoreno/onion">Onion</a> - HTTP server library in C designed to be lightweight and easy to use. [Apache2/GPL2]</li>
<li><a href="https://github.com/ntop/PF_RING">PF_RING™</a> - High-speed packet processing framework. [LGPL-2.1] <a href="https://www.ntop.org/products/packet-capture/pf_ring/">website</a></li>
<li><a href="https://github.com/h2o/picohttpparser">PicoHTTPParser</a> - A tiny, primitive, fast HTTP request/response parser. [MIT]</li>
<li><a href="https://github.com/pocoproject">POCO</a> :zap: - C++ class libraries and frameworks for building network- and internet-based applications that run on desktop, server, mobile and embedded systems. [Boost] <a href="http://pocoproject.org/">website</a></li>
<li><a href="https://github.com/facebook/proxygen">Proxygen</a> - Facebook’s collection of C++ HTTP libraries including an easy to use HTTP server. [BSD]</li>
<li><a href="https://github.com/OculusVR/RakNet">RakNet</a> - A cross platform, open source, C++ networking engine for game programmers. [BSD]</li>
<li><a href="https://github.com/mrtazz/restclient-cpp">restclient-cpp</a> - Simple REST client for C++. It wraps libcurl for HTTP requests. [MIT]</li>
<li><a href="https://github.com/mattgodbolt/seasocks">Seasocks</a> - Simple, small, C++ embeddable webserver with WebSockets support. [BSD]</li>
<li><a href="http://siliconframework.org">Silicon</a> - A high performance, middleware oriented C++14 http web framework. [MIT]</li>
<li><a href="https://github.com/eduardsui/tlse">tlse</a> - Single C file TLS 1.2/1.3 implementation, using tomcrypt as crypto library [BSD-2-Clause]</li>
<li><a href="https://github.com/vinipsmaker/tufao">Tufão</a> - An asynchronous web framework for C++ built on top of Qt. [LGPL2]</li>
<li><a href="https://github.com/uriparser/uriparser">uriparser</a> - Strictly RFC 3986 compliant URI parsing and handling library. [BSD-3-Clause]</li>
<li><a href="https://github.com/uNetworking/uWebSockets">uWebSockets</a> - µWS is one of the most lightweight, efficient & scalable WebSocket & HTTP server implementations available. [Zlib]</li>
<li><a href="https://github.com/riolet/WAFer">WAFer</a> - A C language-based ultra-light software platform for scalable server-side and networking applications. Think node.js for C programmers. [GPL2]</li>
<li><a href="https://github.com/facebook/wangle">Wangle</a> - A client/server application framework to build asynchronous, event-driven modern C++ services. [Apache-2.0]</li>
<li><a href="https://github.com/facebook/wdt">wdt</a> - An embeddedable library (and command line tool) aiming to transfer data between 2 systems as fast as possible over multiple TCP paths. [BSD-3-Clause]</li>
<li><a href="https://github.com/zaphoyd/websocketpp">WebSocket++</a> - C++/Boost Asio based websocket client/server library. [BSD]</li>
<li><a href="https://github.com/seladb/PcapPlusPlus">PcapPlusPlus</a> - a multiplatform C++ network sniffing and packet parsing and crafting framework. [Unlicense]</li>
<li><a href="https://github.com/zeromq/libzmq">ZeroMQ</a> - High-speed, modular asynchronous communication library. [LGPL] <a href="http://zeromq.org/">website</a></li>
</ul>
<h2 id="pdf">PDF</h2>
<p><em>Libraries for parsing and manipulating PDF documents.</em></p>
<ul>
<li><a href="https://github.com/libharu/libharu">libharu</a> - A free, cross platform, open-sourced software library for generating PDF. [zlib]</li>
<li><a href="https://litepdf.sourceforge.io">litePDF</a> - Library to create and edit PDF documents that uses GDI functions through a device context to draw the page content. [LGPL v3 and zlib]</li>
<li><a href="https://mupdf.com/">MuPDF</a> - A lightweight PDF, XPS, and E-book viewer. [AGPL/Commercial]</li>
<li><a href="http://podofo.sourceforge.net/">PoDoFo</a> - A library to work with the PDF file format. [LGPL]</li>
<li><a href="https://poppler.freedesktop.org/">Poppler</a> - Open-source multi-backend PDF rendering library based on the xpdf-3.0 code base. [GPLv2/GPLv3]</li>
<li><a href="https://www.xpdfreader.com/">Xpdf</a> - Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. [GPL v2/GPL v3]</li>
<li><a href="http://www.dynaforms.com/">DynaPDF</a> - An easy-to-use PDF generation library. [Commercial]</li>
</ul>
<h2 id="physics">Physics</h2>
<p><em>Dynamics simulation engines</em></p>
<ul>
<li><a href="https://github.com/erincatto/Box2D">Box2D</a> - A 2D physics engine for games. [BSD-like]</li>
<li><a href="https://github.com/bulletphysics/bullet3">Bullet</a> - A 3D physics engine for games. [zlib] <a href="http://bulletphysics.org">website</a></li>
<li><a href="https://github.com/slembcke/Chipmunk2D">Chipmunk</a> - A fast and lightweight 2D game physics library. [MIT] <a href="https://chipmunk-physics.net/">website</a></li>
<li><a href="https://github.com/google/liquidfun">LiquidFun</a> - A 2D physics engine for games. [BSD-like]</li>
<li><a href="https://github.com/MADEAPPS/newton-dynamics">Newton Dynamics</a> - An integrated solution for real time simulation of physics environments. [zlib]</li>
<li><a href="http://www.ode.org/">ODE</a> - Open Dynamics Engine - An open source, high performance library for simulating rigid body dynamics. [BSD&LGPL]</li>
<li><a href="https://github.com/KratosMultiphysics/Kratos">Kratos</a> - framework for building parallel, multi-disciplinary simulation software, aiming at modularity, extensibility, and high performance. [BSD] <a href="http://www.cimne.com/kratos/">website</a></li>
<li><a href="https://github.com/vanderlin/ofxBox2d">ofxBox2d</a> - openFrameworks wrapper for Box2D. [BSD-like]</li>
<li><a href="https://github.com/NVIDIAGameWorks/PhysX-3.4">PhysX</a> - An open-source realtime physics engine middleware SDK developed by Nvidia as a part of Nvidia GameWorks software suite. [BSD-3-Clause]</li>
<li><a href="https://github.com/projectchrono/chrono">Project Chrono</a> - An open source multi-physics simulation engine. [BSD-3-Clause] <a href="https://projectchrono.org/">website</a></li>
<li><a href="https://github.com/vsoftco/qpp">Quantum++</a> - A modern C++11 quantum computing library. [MIT]</li>
<li><a href="https://github.com/simbody/simbody">Simbody</a> - High-performance C++ multibody dynamics/physics library for simulating articulated biomechanical and mechanical systems like vehicles, robots, and the human skeleton. [Apache2]</li>
<li><a href="https://github.com/sofa-framework/sofa">SOFA</a> - SOFA is an open-source framework targeting at real-time simulation, with an emphasis on medical simulation. [LGPL] <a href="https://www.sofa-framework.org">website</a></li>
</ul>
<h2 id="reflection">Reflection</h2>
<ul>
<li><a href="https://github.com/netcan/config-loader">config-loader</a> - A C++17 static reflection framework, from parse configuration file to native data structure. [MIT]</li>
<li><a href="https://github.com/aantron/better-enums">Better Enums</a> - Reflective enums (to string, iteration). Single header. [BSD] <a href="http://aantron.github.io/better-enums/">website</a></li>
<li><a href="https://github.com/Celtoys/clReflect">clReflect</a> - C++ Reflection using clang. [MIT]</li>
<li><a href="https://github.com/cpgf/cpgf">CPFG</a> - A C++03 library for reflection, callback and script binding. [Apache2] <a href="http://www.cpgf.org/">website</a></li>
<li><a href="https://github.com/AustinBrunkhorst/CPP-Reflection">CPP-Reflection</a> - C++ Reflection using clang. [MIT]</li>
<li><a href="https://github.com/Neargye/magic_enum">Magic Enum</a> - Header-only C++17 library provides static reflection for enums (to string, from string, iteration), work with any enum type without any macro or boilerplate code. [MIT]</li>
<li><a href="https://github.com/apolukhin/magic_get">magic_get</a> - std::tuple like methods for user defined types without any macro or boilerplate code. [Boost]</li>
<li><a href="https://github.com/skypjack/meta">meta</a> - Header-only, non-intrusive and macro-free runtime reflection system in C++. [MIT]</li>
<li><a href="https://github.com/Neargye/nameof">Nameof</a> - Header-only C++17 library provides nameof macros and functions to obtain the simple name of variable, type, function, macro, and enum. [MIT]</li>
<li><a href="https://github.com/billyquith/ponder">Ponder</a> - A C++11 library for reflection. [MIT]</li>
<li><a href="https://github.com/rttrorg/rttr">RTTR</a> - A C++11 library for reflection. [MIT] <a href="http://www.rttr.org">website</a></li>
<li><a href="https://github.com/cbeck88/visit_struct">visit_struct</a> - A miniature library for struct-field reflection in C++. [BSL-1.0]</li>
<li><a href="https://github.com/jsoysouvanh/Refureku">Refureku</a> - A C++17 runtime reflection and code generation library. [MIT]</li>
</ul>
<h2 id="regular-expression">Regular Expression</h2>
<ul>
<li><a href="https://github.com/VerbalExpressions/CppVerbalExpressions">CppVerbalExpressions</a> - C++ regular expressions made easy. [MIT]</li>
<li><a href="https://github.com/hanickadot/compile-time-regular-expressions">CTRE</a> - A Compile time PCRE (almost) compatible regular expression matcher. [MIT]</li>
<li><a href="https://github.com/intel/hyperscan">Hyperscan</a> - Hyperscan is a high-performance multiple regex matching library by Intel. Provides simultaneous matching of large numbers of regexps (up to tens of thousands). Typically used in a DPI library stack. [BSD]</li>
<li><a href="https://github.com/kkos/oniguruma">Oniguruma</a> - A modern and flexible regular expressions library that supports a variety of character encodings. [BSD]</li>
<li><a href="http://pcre.org/">PCRE</a> - A regular expression C library inspired by the regular expression capabilities in Perl. [BSD]</li>
<li><a href="https://github.com/yandex/pire">PIRE</a> - Perl Incompatible Regular Expressions library by Yandex. Can be really fast (more than 400 MB/s). [LPGL v3.0]</li>
<li><a href="https://github.com/google/re2">RE2</a> - A software library for regular expressions via a finite-state machine using automata theory. [BSD-3-Clause]</li>
<li><a href="https://github.com/cesanta/slre">SLRE</a> - Super Light Regexp engine for C/C++. [GPLv2/Commercial]</li>
<li><a href="https://github.com/openresty/sregex">sregex</a> - A non-backtracking NFA/DFA-based Perl-compatible regex engine library for matching on large data streams. [BSD]</li>
</ul>
<h2 id="robotics">Robotics</h2>
<ul>
<li><a href="http://moos-ivp.org">MOOS-IvP</a> - A set of open source C++ modules for providing autonomy on robotic platforms, in particular autonomous marine vehicles.</li>
<li><a href="http://www.mrpt.org/">MRPT</a> - Mobile Robot Programming Toolkit. [BSD]</li>
<li><a href="https://github.com/PointCloudLibrary/pcl">PCL</a> - Point Cloud Library is a standalone, large scale, open project for 2D/3D image and point cloud processing [BSD] <a href="http://www.pointclouds.org/">website</a></li>
<li><a href="http://www.roboticslibrary.org/">Robotics Library (RL)</a> - A self-contained C++ library for robot kinematics, motion planning and control. [BSD]</li>
<li><a href="https://gitlab.com/sdurobotics/RobWork">RobWork</a> - A collection of C++ libraries for simulation and control of robot systems. [Apache2] <a href="http://www.robwork.dk/">website</a></li>
<li><a href="http://wiki.ros.org/">ROS</a> - Robot Operating System provides libraries and tools to help software developers create robot applications. [BSD]</li>
<li><a href="https://github.com/robotology/yarp">YARP (Yet Another Robot Platform)</a> - Library and toolkit for communication and device interfaces. [BSD-3-Clause] <a href="http://www.yarp.it/">website</a></li>
</ul>
<h2 id="scientific-computing">Scientific Computing</h2>
<ul>
<li><a href="https://github.com/ddemidov/amgcl">AMGCL</a> - a header-only C++ library for solving large sparse linear systems with algebraic multigrid. [MIT]</li>
<li><a href="http://www.fftw.org/">FFTW</a> - A C library for computing the DFT in one or more dimensions. [GPL]</li>
<li><a href="http://www.gnu.org/software/gsl/">GSL</a> - GNU scientific library. [GPL]</li>
<li><a href="https://github.com/precice/precice">preCICE</a> - Coupling library for partitioned multi-physics simulations (FSI, CHT, and more). [LGPL] <a href="https://precice.org/">website</a></li>
<li><a href="https://github.com/TileDB-Inc/TileDB">TileDB</a> - Fast Dense and Sparse Multidimensional Array DBMS. [MIT] <a href="https://tiledb.io/">website</a></li>
<li><a href="https://github.com/trilinos/Trilinos">Trilinos</a> - High performance PDE solvers. [BSD]</li>
<li><a href="https://github.com/torch/torch7">Torch</a> - A scientific computing framework with wide support for machine learning algorithms that puts GPUs first. [BSD-3-Clause] <a href="http://torch.ch/">website</a></li>
</ul>
<h2 id="scripting">Scripting</h2>
<ul>
<li><a href="https://www.angelcode.com/angelscript/">AngelScript</a> - AngelScript is a game-oriented interpreted/compiled scripting language. [zlib]</li>
<li><a href="http://www.boost.org/doc/libs/1_65_1/libs/python/doc/html/index.html">Boost.Python</a> - A C++ library which enables seamless interoperability between C++ and the Python programming language. [Boost]</li>
<li><a href="https://github.com/tbenthompson/cppimport">cppimport</a> - Import C++ files directly from Python! [MIT]</li>
<li><a href="https://github.com/mono/CppSharp">CppSharp</a> - Tools and libraries to glue C/C++ APIs to high-level languages. [MIT]</li>
<li><a href="https://github.com/ChaiScript/ChaiScript/">ChaiScript</a> - An easy to use embedded scripting language for C++. [BSD] <a href="http://chaiscript.com/">website</a></li>
<li><a href="https://github.com/taviso/ctypes.sh">ctypes.sh</a> - A foreign function interface for bash. [MIT]</li>
<li><a href="https://github.com/cython/cython">Cython</a> - Cython is an optimising static compiler for both the Python programming language and the extended Cython programming language (based on Pyrex). It makes writing C extensions for Python as easy as Python itself. [Apache] <a href="http://cython.org/">website</a></li>
<li><a href="https://djinni.xlcpp.dev">djinni</a> - A tool for generating cross-language type declarations and interface bindings. [Apache2]</li>
<li><a href="https://github.com/svaarala/duktape">Duktape</a> - An embeddable Javascript engine with compact footprint. [MIT] <a href="http://duktape.org">website</a></li>
<li><a href="https://github.com/bytedeco/javacpp">JavaCpp</a> - The missing bridge between Java and native C++. [Apache2]</li>
<li><a href="https://github.com/libffi/libffi">libffi</a> - A portable foreign-function interface library. [MIT] <a href="https://sourceware.org/libffi/">website</a></li>
<li><a href="http://www.lua.org/">Lua</a> - A minimal and fast scripting engine for configuration files and basic application scripting. [MIT]</li>
<li><a href="https://github.com/vinniefalco/LuaBridge">LuaBridge</a> - A lightweight, dependency-free library for binding Lua to C++. [MIT]</li>
<li><a href="https://github.com/dafrito/luacxx">luacxx</a> - C++11 API for creating Lua bindings. [MIT]</li>
<li><a href="https://github.com/charto/nbind">nbind</a> - Magical headers that make your C++ library accessible from JavaScript. [MIT]</li>
<li><a href="https://github.com/CopernicaMarketingSoftware/PHP-CPP">PHP-CPP</a> - A library to build PHP extensions with C++. [Apache2] <a href="http://www.php-cpp.com/">website</a></li>
<li><a href="https://github.com/pybind/pybind11">pybind11</a> - Seamless operability between C++11 and Python. [BSD]</li>
<li><a href="https://riverbankcomputing.com/software/sip/intro">SIP</a> - C or C++ Bindings Generator for Python v2 and v3. [GPL]</li>
<li><a href="https://github.com/ThePhD/sol2">sol2</a> - A C++ <-> Lua API wrapper with advanced features and top notch performance. [MIT]</li>
<li><a href="https://github.com/swig/swig">SWIG</a> - A wrapper/interface Generator that let you link your c++ code to Javascript, Perl, PHP, Python, Tcl and Ruby. [GPL/Output not licensed] <a href="http://www.swig.org/">website</a></li>
<li><a href="https://github.com/cesanta/v7">V7</a> - An embedded JavaScript engine. [GPL2]</li>
<li><a href="https://v8.dev">V8</a> - A fast JavaScript engine by Google that can be embedded into any C++ application. [BSD]</li>
<li><a href="https://github.com/Microsoft/ChakraCore">ChakraCore</a> -A JavaScript engine by Microsoft that can be embedded into nodejs. [MIT]</li>
</ul>
<h2 id="serialization">Serialization</h2>
<ul>
<li><a href="https://github.com/fraillt/bitsery">Bitsery</a> - Header only C++ binary serialization library. [MIT]</li>
<li><a href="https://github.com/Microsoft/bond">Bond</a> - An open source, cross-platform framework for working with schematized data. [MIT]</li>
<li><a href="https://www.boost.org/doc/libs/master/libs/serialization/doc/index.html">Boost.Serialization</a> - Boost Serialization Library. [Boost]</li>
<li><a href="https://github.com/capnproto/capnproto">Cap’n Proto</a> - Fast data interchange format and capability-based RPC system. [MIT] <a href="https://capnproto.org/">website</a></li>
<li><a href="https://github.com/USCiLab/cereal">cereal</a> - A C++11 library for serialization. [BSD]</li>
<li><a href="https://github.com/felixguendling/cista">cista</a> - A C++17 library for zero-copy high-performance (de-)serialization. [MIT]</li>
<li><a href="https://github.com/tplgy/cppcodec">cppcodec</a> - Header-only C++11 library to encode/decode base64, base32 and hex with consistent, flexible API. [MIT]</li>
<li><a href="https://github.com/chronoxor/FastBinaryEncoding">FastBinaryEncoding</a> - Fast Binary Encoding is ultra fast and universal serialization solution for C++, C#, Go, Java, JavaScript, Kotlin, Python, Ruby, Swift. [MIT]</li>
<li><a href="https://github.com/google/flatbuffers">FlatBuffers</a> - A Memory efficient serialization library. [Apache2]</li>
<li><a href="https://github.com/msgpack/msgpack-c">MessagePack</a> - Efficient binary serialization format “like JSON” for C and C++. [Apache2] <a href="http://msgpack.org/">website</a></li>
<li><a href="https://github.com/mrpt/mrpt/">mrpt-serialization</a> - Versioned serialization to binary or text formats. [BSD] <a href="https://docs.mrpt.org/reference/latest/group_mrpt_serialization_grp.html">website</a></li>
<li><a href="https://github.com/nanopb/nanopb">nanopb</a> - Small code-size Protocol Buffers implementation in ANSI C. [Zlib]</li>
<li><a href="https://github.com/protocolbuffers/protobuf">protobuf</a> - Protocol Buffers - Google’s data interchange format. [BSD]</li>
<li><a href="https://github.com/protobuf-c/protobuf-c">protobuf-c</a> - Protocol Buffers implementation in C. [BSD]</li>
<li><a href="https://github.com/real-logic/simple-binary-encoding">SimpleBinaryEncoding</a> - encoding and decoding application messages in binary format for low-latency applications. [Apache2]</li>
<li><a href="https://github.com/protocolbuffers/upb">upb</a> - A small protobuf implementation in C. [BSD]</li>
<li><a href="https://github.com/niXman/yas">YAS</a> - Very fast <strong>Y</strong>et <strong>A</strong>nother <strong>S</strong>erialization library supports the binary/text/json formats. [Boost]</li>
</ul>
<h2 id="sorting">Sorting</h2>
<ul>
<li><a href="https://github.com/orlp/pdqsort">pdqsort</a> - Pattern-defeating quicksort. [zlib]</li>
<li><a href="https://github.com/gfx/cpp-TimSort">Timsort</a> - A templated stable sorting function which outperforms quicksort-based algorithms including std::sort, for reversed or semi-sorted data. [MIT]</li>
<li><a href="https://github.com/mattreecebentley/plf_indiesort">Indiesort</a> - A sort wrapper which enables the use of std::sort (& other random-access sort functions) with non-random-access containers, and also improves sort performance for large/non-trivially-copyable types in random-access containers and arrays. [zLib] <a href="https://plflib.org/indiesort.htm">website</a></li>
</ul>
<h2 id="video">Video</h2>
<ul>
<li><a href="http://www.webmproject.org/code/">libvpx</a> - VP8/VP9 Codec SDK. [BSD]</li>
<li><a href="https://www.ffmpeg.org/">FFmpeg</a> - A complete, cross-platform solution to record, convert and stream audio and video. [LGPL2/GPL2]</li>
<li><a href="https://github.com/strukturag/libde265">libde265</a> - Open h.265 video codec implementation. [LGPL] <a href="http://www.libde265.org/">website</a></li>
<li><a href="https://bitbucket.org/multicoreware/x265_git/src">x265</a> - Open h.265 video codec implementation. [GPL2] <a href="https://x265.readthedocs.io/en/master/">website</a></li>
<li><a href="https://github.com/cisco/openh264">OpenH264</a> - Open Source H.264 Codec. [BSD] <a href="http://www.openh264.org/">website</a></li>
<li><a href="http://www.theora.org/">Theora</a> - A free and open video compression format. [BSD]</li>
<li><a href="https://github.com/twitter/vireo/">Vireo</a> - A lightweight and versatile video processing library by Twitter. [MIT]</li>
</ul>
<h2 id="virtual-machines">Virtual Machines</h2>
<ul>
<li><a href="https://github.com/tekknolagi/carp">CarpVM</a> - “interesting” VM in C. Let’s see how this goes. [GPLv3]</li>
<li><a href="https://github.com/micropython/micropython">MicroPython</a> - Aims to put an implementation of Python 3.x on a microcontroller. [MIT]</li>
<li><a href="https://github.com/jakogut/tinyvm">TinyVM</a> - A small, fast, lightweight virtual machine written in pure ANSI C. [MIT]</li>
</ul>
<h2 id="web-application-framework">Web Application Framework</h2>
<ul>
<li><a href="https://github.com/civetweb/civetweb">Civetweb</a> - Provides easy to use, powerful, C/C++ embeddable web server with optional CGI, SSL and Lua support. [MIT]</li>
<li><a href="https://github.com/Microsoft/cpprestsdk">C++ REST SDK</a> - Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. [MIT]</li>
<li><a href="http://cppcms.com/">CppCMS</a> - A Free High Performance Web Development Framework (not a CMS). [LGPLv3]</li>
<li><a href="https://github.com/CrowCpp/Crow">Crow</a> - Crow is a C++ microframework for running web services. It uses routing similar to Python’s Flask. [BSD] <a href="https://crowcpp.org">website</a></li>
<li><a href="https://github.com/cutelyst/cutelyst">Cutelyst</a> - A C++ Web Framework built on top of Qt, using the simple approach of Catalyst (Perl) framework. [LGPLv2.1+] <a href="https://cutelyst.org/">website</a></li>
<li><a href="https://github.com/an-tao/drogon">Drogon</a> - A C++14/17 based, high-performance HTTP application framework. [MIT]</li>
<li><a href="https://github.com/boazsegev/facil.io">facil.io</a> - Evented, high performance C web framework supporting HTTP, WebSockets, SSE and more. [MIT] <a href="http://facil.io">website</a></li>
<li><a href="https://kore.io/">Kore</a> - ultra fast and flexible web server / framework for web applications developed in C. [ISC]</li>
<li><a href="http://www.coralbits.com/libonion/">libOnion</a> - lightweight library to help you create webservers in C programming language. [LGPLv3]</li>
<li><a href="https://github.com/lpereira/lwan">lwan</a> - Experimental, scalable, high performance HTTP server. [GPL2]</li>
<li><a href="https://github.com/oatpp/oatpp">oat++</a> - Light, zero-dependency framework to create high-performance web-services. [Apache-2.0] <a href="https://oatpp.io/">website</a></li>
<li><a href="http://pistache.io/">Pistache</a> - Pistache is a C++ REST framework written in pure C++11 with no external dependency. [Apache2]</li>
<li><a href="https://github.com/jlaine/qdjango/">QDjango</a> - A web framework written in C++ and built on top of the Qt library. Where possible it tries to follow django’s API, hence its name. [LGPL]</li>
<li><a href="https://github.com/treefrogframework/treefrog-framework">TreeFrog Framework</a> - High-speed and full-stack web application framework based on C++ and Qt, which supports HTTP and WebSocket protocol (with O/R mapping). [BSD] <a href="http://www.treefrogframework.org/">website</a></li>
<li><a href="http://www.webtoolkit.eu/wt">Wt</a> - A C++ library for developing web applications. [GPL/Commercial]</li>
</ul>
<h2 id="xml">XML</h2>
<p><em>XML is crap. Really. There are no excuses. XML is nasty to parse for humans, and it’s a disaster to parse even for computers. There’s just no reason for that horrible crap to exist. - Linus Torvalds</em></p>
<ul>
<li><a href="http://www.boost.org/doc/libs/1_55_0/doc/html/property_tree.html">Boost.PropertyTree</a> - A property tree parser/generator that can be used to parse XML/JSON/INI/Info files. [Boost]</li>
<li><a href="http://www.libexpat.org/">Expat</a> - An XML parser library written in C. [MIT]</li>
<li><a href="http://xmlsoft.org/">Libxml2</a> - The XML C parser and toolkit of Gnome. [MIT]</li>
<li><a href="http://libxmlplusplus.sourceforge.net/">libxml++</a> - An XML Parser for C++. [LGPL2]</li>
<li><a href="https://github.com/michaelrsweet/mxml">Mini-XML</a> - A small XML parsing library written in ANSI C. [LGPL2 with exceptions]</li>
<li><a href="http://pugixml.org/">PugiXML</a> - A light-weight, simple and fast XML parser for C++ with XPath support. [MIT]</li>
<li><a href="http://rapidxml.sourceforge.net/">RapidXml</a> - An attempt to create the fastest XML parser possible, while retaining useability, portability and reasonable W3C compatibility. [Boost]</li>
<li><a href="http://sourceforge.net/projects/tinyxml/">TinyXML</a> - A simple, small, minimal, C++ XML parser that can be easily integrating into other programs. [zlib]</li>
<li><a href="https://github.com/leethomason/tinyxml2">TinyXML2</a> - A simple, small, efficient, C++ XML parser that can be easily integrating into other programs. [zlib]</li>
<li><a href="https://github.com/rjpcomputing/ticpp">TinyXML++</a> - A completely new interface to TinyXML that uses MANY of the C++ strengths. Templates, exceptions, and much better error handling. [MIT]</li>
<li><a href="http://xerces.apache.org/xerces-c/">Xerces-C++</a> - A validating XML parser written in a portable subset of C++. [Apache2]</li>
</ul>
<h2 id="yaml">Yaml</h2>
<ul>
<li><a href="https://github.com/jimmiebergmann/mini-yaml">mini-yaml</a> - Single header YAML 1.0 C++11 serializer/deserializer. [MIT]</li>
<li><a href="https://github.com/jbeder/yaml-cpp">yaml-cpp</a> - A YAML parser and emitter in C++ [MIT]</li>
</ul>
<h2 id="miscellaneous">Miscellaneous</h2>
<p><em>Useful libraries or tools that don’t fit in the categories above or maybe just not categorised yet</em></p>
<ul>
<li><a href="https://github.com/arvidn/access_profiler">access_profiler</a> - A tool to count accesses to member variables in c++ programs. [GPL3]</li>
<li><a href="http://lcamtuf.coredump.cx/afl/">American fuzzy lop</a> a.k.a. afl-fuzz - Crazy fuzzing tool that automatically discovers bugs given time and minimal example input. [Apache2]</li>
<li><a href="http://bstring.sourceforge.net">Better String</a> - An alternative to the string library for C which is more functional and does not have buffer overflow overrun problems. Also includes a C++ wrapper. [BSD, GPL2]</li>
<li><a href="http://www.boost.org/doc/libs/1_56_0/doc/html/signals.html">Boost.Signals</a> - An implementation of a managed signals and slots system. [Boost]</li>
<li><a href="https://github.com/ryanhaining/cppitertools">CPPItertools</a> - Range-based for loop add-ons inspired by the Python builtins and itertools library. [BSD-2-Clause]</li>
<li><a href="https://github.com/iboB/dynamix">DynaMix</a> - A library which allows you to compose and modify objects at run time. [MIT]</li>
<li><a href="https://github.com/fmtlib/fmt">{fmt}</a> :zap: - Small, safe and fast formatting library for C++. [Simplified BSD]</li>
<li><a href="http://www.fastformat.org">FastFormat</a> - Fast, Safe C++ Formatting inspired by log4j and Pantheios [Simplified BSD]</li>
<li><a href="https://code.google.com/p/casacore/">casacore</a> - A set of c++ core libraries derived from aips++. [LGPL]</li>
<li><a href="https://github.com/VerbalExpressions/QtVerbalExpressions">QtVerbalExpressions</a> - This Qt lib is based off of the C++ VerbalExpressions library. [MIT]</li>
<li><a href="https://github.com/louisdx/cxx-prettyprint">cxx-prettyprint</a> - A pretty printing library for C++ containers. [Boost]</li>
<li><a href="https://github.com/renatoGarcia/icecream-cpp">icecream-cpp</a> - A small printing library for debugging purposes. [MIT]</li>
<li><a href="https://github.com/leafsr/gcc-poison">gcc-poison</a> - A simple header file for developers to ban unsafe C/C++ functions from applications.</li>
<li><a href="https://github.com/gracicot/kangaru">Kangaru</a> - A dependency injection container for C++11 and C++14. [MIT]</li>
<li><a href="https://github.com/attractivechaos/klib">Klib</a> - Small and lightweight implementations of common algorithms and data structures. [MIT]</li>
<li><a href="https://github.com/libsigcplusplus/libsigcplusplus">libsigc++</a> - A typesafe callback system for standard C++. [LGPL] <a href="https://libsigcplusplus.github.io/libsigcplusplus">website</a></li>
<li><a href="https://github.com/anrieff/libcpuid">libcpuid</a> - A small C library for x86 CPU detection and feature extraction. [BSD]</li>
<li><a href="https://github.com/avati/libevil">libevil</a> - The Evil License Manager. [GPLv3]</li>
<li><a href="https://github.com/keybuk/libnih">libnih</a> - A lightweight library of C functions and structures. [GPL2.1]</li>
<li><a href="https://libusb.info/">libusb</a> - A universal USB library which allows for portable access to USB devices. [LGPL2]</li>
<li><a href="https://github.com/solodon4/Mach7">Mach7</a> - A Pattern-matching library for C++. [BSD]</li>
<li><a href="https://github.com/mandreyel/mio">mio</a> - Cross-platform C++11 header-only library for memory mapped file IO. [MIT]</li>
<li><a href="https://github.com/taocpp/PEGTL">PEGTL</a> - The Parsing Expression Grammar Template Library. [MIT]</li>
<li><a href="http://www.deltavsoft.com/">Remote Call Framework</a> - Inter-process communication framework for C++. [GPL2/Commercial]</li>
<li><a href="http://scintilla.org/">Scintilla</a> - A free source code editing component. [MIT]</li>
<li><a href="https://github.com/antirez/sds">SDS</a> - Simple Dynamic Strings library for C. [BSD]</li>
<li><a href="https://github.com/h2non/semver.c">semver.c</a> - A semver parser and render in ANSI C. [MIT]</li>
<li><a href="https://github.com/wjwwood/serial">Serial Communication Library</a> - Cross-platform, Serial Port library written in C++. [MIT]</li>
<li><a href="http://sigslot.sourceforge.net/">sigslot</a> - C++ Signal/Slot Library. [PublicDomain]</li>
<li><a href="https://github.com/larspensjo/SimpleSignal">SimpleSignal</a> - High performance C++11 signals. [PublicDomain]</li>
<li><a href="https://github.com/rtv/Stage">Stage</a> - Mobile robot simulator. [GPL2]</li>
<li><a href="https://github.com/jeaye/stdman">stdman</a> Formatted C++11/14 stdlib man pages (from cppreference). [MIT]</li>
<li><a href="https://github.com/nothings/stb">stb</a> :zap: - A range of single-file libraries for C/C++. [PublicDomain]</li>
<li><a href="http://www.partow.net/programming/strtk/index.html">StrTk</a> - A C++ library consisting of high performance string processing routines. [MIT]</li>
<li><a href="https://tulipindicators.org">Tulip Indicators</a> - A C library of over 100 financial technical analysis indicators. [LGPL]</li>
<li><a href="https://github.com/regehr/ub-canaries">ub-canaries</a> - A collection of C/C++ programs that try to get compilers to exploit undefined behavior.</li>
<li><a href="https://github.com/jeaye/value-category-cheatsheet">value-category-cheatsheet</a> A PDF cheatsheet for lvalues, rvalues, and the like. [Jank copyleft]</li>
<li><a href="https://github.com/szi/vartypes">VarTypes</a> - A feature-rich, object-oriented framework for managing variables in C++ / Qt4. [LGPL]</li>
<li><a href="http://zbar.sourceforge.net/">ZBar</a> - A barcode scanner library, which allows to scan photos/images/video streams for barcodes and return their value. [LGPL2]</li>
<li><a href="https://github.com/zxing/zxing/">ZXing</a> - An open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages. [Apache]</li>
<li><a href="https://github.com/p-ranav/pprint">pprint</a> - Pretty Printer for Modern C++. [MIT]</li>
</ul>
<h1 id="software">Software</h1>
<p><em>Software for creating a development environment.</em></p>
<h2 id="compiler">Compiler</h2>
<p><em>List of C or C++ compilers</em></p>
<ul>
<li><a href="https://github.com/rui314/8cc">8cc</a> - A Small C Compiler.</li>
<li><a href="https://github.com/ryanmjacobs/c">c</a> - Compile and execute C “scripts” in one go! [MIT]</li>
<li><a href="http://clang.llvm.org/">Clang</a> - A C compiler for LLVM. Supports C++11/14/1z C11. Developed by LLVM Team. [NCSA]</li>
<li><a href="https://gcc.gnu.org/">GCC</a> - GNU Compiler Collection. Supports C++11/14/1z C11 and OpenMP. [GNU GPL3]</li>
<li><a href="http://pcc.ludd.ltu.se/">PCC</a> - A very old C compiler. Supports C99.</li>
<li><a href="https://software.intel.com/en-us/c-compilers">Intel C++ Compiler</a> - Developed by Intel.</li>
<li><a href="http://llvm.org/">LLVM</a> - Collection of modular and reusable compiler and toolchain technologies.</li>
<li><a href="https://docs.microsoft.com/en-us/cpp/dotnet/dotnet-programming-with-cpp-cli-visual-cpp?view=msvc-160">Microsoft Visual C++</a> - MSVC, developed by Microsoft.</li>
<li><a href="https://github.com/open-watcom">Open WatCom</a> - Watcom C, C++, and Fortran cross compilers and tools. [Sybase Open Watcom Public License]</li>
<li><a href="http://www.oracle.com/technetwork/server-storage/solarisstudio/overview/index.html">Oracle Solaris Studio</a> - C, C++ and Fortran compiler for SPARC and x86. Supports C++11. Available on Linux and Solaris. [OTN Developer License]</li>
<li><a href="http://bellard.org/tcc/">TCC</a> - Tiny C Compiler. [LGPL]</li>
</ul>
<h2 id="online-compiler">Online Compiler</h2>
<p><em>List of online C or C++ compilers</em></p>
<ul>
<li><a href="https://www.codechef.com/ide">codechef</a> - A simple online compiler CodeChef.</li>
<li><a href="http://codepad.org/">codepad</a> - An online compiler/interpreter, and a simple collaboration tool.</li>
<li><a href="http://coliru.stacked-crooked.com/">coliru</a> - Online compiler/shell with support for various C++ compilers.</li>
<li><a href="http://gcc.godbolt.org/">Compiler Explorer</a> - An interactive compiler with assembly output available.</li>
<li><a href="http://www.tutorialspoint.com/codingground.htm">CompileOnline</a> - Compile and Execute C++ online on Linux.</li>
<li><a href="http://ideone.com/">Ideone</a> - An online compiler and debugging tool which allows you to compile source code and execute it online in more than 60 programming languages.</li>
<li><a href="https://repl.it">repl.it</a> - A powerful yet simple tools and platforms for educators, learners, and developers.</li>
<li><a href="http://rextester.com/runcode">Rextester</a> - Online compiler which provides several compilers(Clang, GCC, MSVC) and several editors.</li>
<li><a href="https://tio.run/">Try It Online</a> - TIO is a family of online interpreters for an evergrowing list of practical and recreational programming languages.</li>
<li><a href="http://melpon.org/wandbox/">Wandbox</a> - An online Clang/GCC compiler with Boost available.</li>
<li><a href="https://paiza.io/en">paiza.io</a> - An online C/C++ compiler with multiple files supporting feature, Github(gist) integration and collaborative editing.</li>
<li><a href="https://www.interviewbit.com/online-cpp-compiler/">InterviewBit</a> - A simple and easy to use online C++ compiler.</li>
</ul>
<h2 id="debugger">Debugger</h2>
<p><em>List of C or C++ debuggers</em></p>
<ul>
<li><a href="https://en.wikipedia.org/wiki/Comparison_of_debuggers">Comparison of debuggers</a> - A list of Debuggers from Wikipedia.</li>
<li><a href="https://www.gnu.org/software/gdb/">GDB</a> - GNU Debugger.</li>
<li><a href="http://lldb.llvm.org/">LLDB</a> - The LLDB Debugger.</li>
<li><a href="https://metashell.readthedocs.org">Metashell</a> - An interactive template metaprogramming shell which includes the MDB metadebugger.</li>
<li><a href="http://valgrind.org/">Valgrind</a> - A tool for memory debugging, memory leak detection, and profiling.</li>
<li><a href="http://x64dbg.com/">x64dbg</a> - An open-source x64/x32 debugger for windows.</li>
</ul>
<h2 id="integrated-development-environment">Integrated Development Environment</h2>
<p><em>List of C or C++ nominal IDEs.</em></p>
<ul>
<li><a href="http://anjuta.org/">Anjuta DevStudio</a> - The GNOME IDE. [GPL3]</li>
<li><a href="http://www.jetbrains.com/objc/">AppCode</a> - an IDE for Objective-C, C, C++, and JavaScript development built on JetBrains’ IntelliJ IDEA platform.</li>
<li><a href="https://www.cevelop.com">Cevelop</a> - Cross-platform C and C++ IDE based on Eclipse CDT with additional plug-ins.</li>
<li><a href="http://www.jetbrains.com/clion/">CLion</a> - Cross-platform C and C++ IDE from JetBrains.</li>
<li><a href="http://www.codeblocks.org/">Code::Blocks</a> - A free C, C++ and Fortran IDE.</li>
<li><a href="http://codelite.org/">CodeLite</a> - Another cross-plaform, free C and C++ IDE. [GPL2 with an exception for plugins]</li>
<li><a href="https://github.com/jeaye/color_coded">color_coded</a> - A vim plugin for libclang-based highlighting. [MIT]</li>
<li><a href="http://sourceforge.net/projects/orwelldevcpp/">Dev-C++</a> - A portable C/C++/C++11 IDE.</li>
<li><a href="http://www.eclipse.org/cdt/">Eclipse CDT</a> - A fully functional C and C++ IDE based on the Eclipse platform.</li>
<li><a href="http://www.geany.org/">Geany</a> - Small, fast, cross-platform IDE. [GPL]</li>
<li><a href="http://www-03.ibm.com/software/products/en/visgen">IBM VisualAge</a> - A family of computer integrated development environments from IBM.</li>
<li><a href="https://github.com/Sarcasm/irony-mode">Irony-mode</a> - A C/C++ minor mode for Emacs powered by libclang.</li>
<li><a href="https://gitlab.com/cppit/jucipp">juCi++</a> - Cross-platform, lightweight C++ IDE with libclang integration. [MIT]</li>
<li><a href="https://www.kdevelop.org/">KDevelop</a> - A free, open source IDE.</li>
<li><a href="https://www.visualstudio.com/">Microsoft Visual Studio</a> - An IDE from Microsoft.</li>
<li><a href="https://code.visualstudio.com/">Microsoft Visual Studio Code</a> :zap: - An open-source IDE from Microsoft. [MIT]</li>
<li><a href="https://netbeans.org/">NetBeans</a> - An IDE for developing primarily with Java, but also with other languages, in particular PHP, C/C++, and HTML5.</li>
<li><a href="http://www.qt.io/developers/">Qt Creator</a> :zap: - A cross-platform C++, JavaScript and QML IDE which is part of the SDK for Qt.</li>
<li><a href="https://github.com/Andersbakken/rtags">rtags</a> - A c/c++ client/server indexer with for integration with emacs based on clang.</li>
<li><a href="https://developer.apple.com/xcode/">Xcode</a> - Developed by Apple.</li>
<li><a href="https://github.com/ycm-core/YouCompleteMe">YouCompleteMe</a> - YouCompleteMe is a fast, as-you-type, fuzzy-search code completion engine for Vim.</li>
<li><a href="https://github.com/cquery-project/cquery/">cquery</a> - A C++ code completion engine for vscode, emacs, vim, etc.</li>
</ul>
<h2 id="build-systems">Build Systems</h2>
<ul>
<li><a href="https://bazel.build">Bazel</a> - A multi-language, fast and scalable build system from Google. [Apache]</li>
<li><a href="https://github.com/rizsotto/Bear">Bear</a> - A tool to generate compilation database for clang tooling. [GPLv3]</li>
<li><a href="https://github.com/facebook/buck">Buck</a> - A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages including C++ developed and used at Facebook. Written in Java. [Apache]</li>
<li><a href="https://build2.org/">build2</a> - cross-platform build, packaging and dependency management toolchain for developing and packaging C/C++ projects. [MIT]</li>
<li><a href="https://github.com/clibs/clib">clib</a> - Package manager for the C programming language. [MIT]</li>
<li><a href="https://cmake.org/">CMake</a> - Cross-platform free and open-source software for managing the build process of software using a compiler-independent method. [BSD]</li>
<li><a href="https://github.com/pfultz2/cget">Cget</a> - Cmake package retrieval. [Boost] <a href="http://cget.readthedocs.io">website</a></li>
<li><a href="https://conan.io/">Conan</a> - C/C++ Package Manager, open sourced. [MIT]</li>
<li><a href="https://github.com/iauns/cpm">CPM</a> - A C++ Package Manager based on CMake and Git.</li>
<li><a href="http://www.fastbuild.org/docs/home.html">FASTBuild</a> - High performance, open-source build system supporting highly scalable compilation, caching and network distribution.</li>
<li><a href="https://www.github.com/ruslo/hunter">Hunter</a> - CMake driven cross-platform package manager for C++. [BSD-2]</li>
<li><a href="http://mesonbuild.com">MesonBuild</a> - An open source build system meant to be both extremely fast, and, even more importantly, as user friendly as possible.</li>
<li><a href="https://ninja-build.org/">Ninja</a> - A small build system with a focus on speed.</li>
<li><a href="http://www.scons.org/">Scons</a> - A software construction tool configured with a Python script.</li>
<li><a href="http://www.sconsolidator.com/">Sconsolidator</a> - Scons build system integration for Eclipse CDT.</li>
<li><a href="https://spack.io/">Spack</a> - A flexible package manager that supports multiple versions, configurations, platforms, and compilers. [Apache-2.0/MIT]</li>
<li><a href="https://software-network.org/">SW</a> - Cross-platform C++ (and other langs) Build System and Package Manager with a lot of packages available. [GPLv3]</li>
<li><a href="https://github.com/deplinenoise/tundra">tundra</a> - High-performance code build system designed to give the best possible incremental build times even for very large software projects.</li>
<li><a href="http://gittup.org/tup/">tup</a> - File-based build system that monitors in the background for changed files.</li>
<li><a href="http://premake.github.io">Premake</a> - A tool configured with a Lua script to generate project files for Visual Studio, GNU Make, Xcode, Code::Blocks, and more across Windows, Mac OS X, and Linux.</li>
<li><a href="https://github.com/microsoft/vcpkg">Vcpkg</a> - C++ library manager for Windows, Linux, and MacOS. [MIT]</li>
<li><a href="https://github.com/waf-project/waf">waf</a> - Python-based framework for configuring, compiling and installing applications. [BSD] <a href="https://waf.io/">website</a></li>
<li><a href="https://xmake.io/">XMake</a> - A C/C++ cross-platform build utility based on Lua. [Apache]</li>
</ul>
<h2 id="static-code-analysis">Static Code Analysis</h2>
<p><em>List of tools for improving quality and reducing defects by code analysis</em></p>
<ul>
<li><a href="http://cppcheck.sourceforge.net/">Cppcheck</a> - A tool for static C/C++ code analysis. - <a href="https://github.com/danmar/cppcheck">source</a></li>
<li><a href="https://www.cppdepend.com/">CppDepend</a> - Simplifies managing a complex C/C++ code base by analyzing and visualizing code dependencies, by defining design rules, by doing impact analysis, and comparing different versions of the code.</li>
<li><a href="https://github.com/cpplint/cpplint">cpplint</a> - A C++ style checker following Google’s C++ style guide.</li>
<li><a href="http://www.viva64.com/en/pvs-studio/">PVS-Studio</a> - A tool for bug detection in the source code of programs, written in C, C++ and C#.</li>
<li><a href="https://github.com/tomtom-international/cpp-dependencies">cpp-dependencies</a> - Tool to check C++ #include dependencies (dependency graphs created in .dot format). [Apache]</li>
<li><a href="https://github.com/include-what-you-use/include-what-you-use">include-what-you-use</a> - A tool for use with clang to analyze includes in C and C++ source files. <a href="https://include-what-you-use.org/">website</a></li>
<li><a href="https://github.com/facebook/infer">Infer</a> - A static analyzer for Java, C and Objective-C. [BSD]</li>
<li><a href="http://oclint.org/">OCLint</a> - A static source code analysis tool to improve quality and reduce defects for C, C++ and Objective-C. - <a href="https://github.com/oclint/oclint">source</a></li>
<li><a href="http://clang-analyzer.llvm.org/index.html">Clang Static Analyzer</a> - A source code analysis tool that finds bugs in C, C++, and Objective-C programs.</li>
<li><a href="http://linticator.com">Linticator</a> - Eclipse CDT integration of Pc-/FlexeLint.</li>
<li><a href="https://github.com/NASA-SW-VnV/ikos">IKOS</a> - Static analyzer for C/C++ based on the theory of Abstract Interpretation. [NOSA 1.3]</li>
<li><a href="https://en.wikipedia.org/wiki/List_of_tools_for_static_code_analysis#C.2FC.2B.2B">List of tools for static code analysis</a> - A list of tools for static code analysis from Wikipedia.</li>
</ul>
<h2 id="coding-style-tools">Coding Style Tools</h2>
<ul>
<li><a href="http://astyle.sourceforge.net/">Artistic Style</a> - A tool to format C/C++/C#/Obj-C/Java code. Also known as astyle.</li>
<li><a href="http://clang.llvm.org/docs/ClangFormat.html">ClangFormat</a> - A tool to format C/C++/Obj-C code.</li>
<li><a href="http://clang.llvm.org/extra/clang-tidy.html">Clang-Tidy</a> - Clang-based C++ linter tool.</li>
<li><a href="https://editorconfig.org/">EditorConfig</a> - EditorConfig helps maintain consistent coding styles across different editors and IDEs.</li>
<li><a href="https://github.com/uncrustify/uncrustify">Uncrustify</a> - Code beautifier.</li>
</ul>
<h1 id="resources">Resources</h1>
<p><em>Various resources, such as books, websites, and articles for improving your C++ development skills and knowledge.</em></p>
<h2 id="api-design">API Design</h2>
<ul>
<li><a href="http://lucumr.pocoo.org/2013/8/18/beautiful-native-libraries/">Beautiful Native Libraries</a></li>
<li><a href="https://doc.qt.io/archives/qq/qq13-apis.html">Designing Qt-Style C++ APIs</a></li>
</ul>
<h2 id="articles">Articles</h2>
<p><em>Fantastic C++ related articles.</em></p>
<ul>
<li><a href="https://github.com/CppCon/CppCon2020">CppCon 2020 Presentation Materials</a> - CppCon 2020 Presentation Materials.</li>
<li><a href="https://github.com/CppCon/CppCon2019">CppCon 2019 Presentation Materials</a> - CppCon 2019 Presentation Materials.</li>
<li><a href="https://github.com/CppCon/CppCon2018">CppCon 2018 Presentation Materials</a> - CppCon 2018 Presentation Materials.</li>
<li><a href="https://github.com/CppCon/CppCon2017">CppCon 2017 Presentation Materials</a> - CppCon 2017 Presentation Materials.</li>
<li><a href="https://github.com/CppCon/CppCon2016">CppCon 2016 Presentation Materials</a> - CppCon 2016 Presentation Materials.</li>
<li><a href="https://github.com/CppCon/CppCon2015">CppCon 2015 Presentation Materials</a> - CppCon 2015 Presentation Materials.</li>
<li><a href="https://github.com/CppCon/CppCon2014">CppCon 2014 Presentation Materials</a> - CppCon 2014 Presentation Materials.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2019">C++Now 2019 Presentations</a> - Presentation materials presented at C++Now 2019.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2018">C++Now 2018 Presentations</a> - Presentation materials presented at C++Now 2018.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2017">C++Now 2017 Presentations</a> - Presentation materials presented at C++Now 2017.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2016">C++Now 2016 Presentations</a> - Presentation materials presented at C++Now 2016.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2015">C++Now 2015 Presentations</a> - Presentation materials presented at C++Now 2015.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2014">C++Now 2014 Presentations</a> - Presentation materials presented at C++Now 2014.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2013">C++Now 2013 Presentations</a> - Presentation materials presented at C++Now 2013.</li>
<li><a href="https://github.com/boostcon/cppnow_presentations_2012">C++Now 2012 Presentations</a> - Presentation materials presented at C++Now 2012.</li>
</ul>
<h2 id="books">Books</h2>
<p><em>Fantastic C or C++ related books.</em></p>
<ul>
<li><a href="https://github.com/fffaraz/awesome-cpp/blob/master/books.md">List of Free C or C++ Books</a></li>
<li><a href="https://github.com/EbookFoundation/free-programming-books/blob/main/books/free-programming-books-langs.md#c">Free C Books</a> - vhf/free-programming-books/C.</li>
<li><a href="https://github.com/EbookFoundation/free-programming-books/blob/main/books/free-programming-books-langs.md#cpp">Free C++ Books</a> - vhf/free-programming-books/C++.</li>
<li><a href="https://github.com/lefticus/cppbestpractices">cppbestpractices</a> - Collaborative Collection of C++ Best Practices.</li>
</ul>
<h2 id="coding-style">Coding Style</h2>
<ul>
<li><a href="https://github.com/isocpp/CppCoreGuidelines">C++ Core Guidelines</a> - “Official” set of C++ guidelines, reviewed by the author of C++.</li>
<li><a href="http://www.chromium.org/developers/coding-style/cpp-dos-and-donts">C++ Dos and Don’ts</a> - The Chromium Projects > For Developers > Coding Style > C++ Dos and Don’ts.</li>
<li><a href="https://github.com/google/styleguide">google-styleguide</a> - Style guides for Google-originated open-source projects.</li>
<li><a href="https://google.github.io/styleguide/cppguide.html">Google C++ Style Guide</a></li>
<li><a href="http://www.gnu.org/prep/standards/standards.html">GNU Coding Standard</a></li>
<li><a href="https://www.kernel.org/doc/Documentation/process/coding-style.rst">Linux kernel coding style</a></li>
<li><a href="http://llvm.org/docs/CodingStandards.html">LLVM Coding Standards</a></li>
</ul>
<h2 id="podcasts">Podcasts</h2>
<ul>
<li><a href="http://cppcast.com">CppCast</a> - The first podcast by C++ developers for C++ developers.</li>
<li><a href="http://cpp.chat">CppChat</a> - A (sometimes) weekly look at what’s going on in the world of C++ chatting with a guest from the community.</li>
</ul>
<h2 id="talks">Talks</h2>
<ul>
<li><a href="https://www.youtube.com/user/CppCon/videos">CppCon Talks</a> :zap: - The C++ conference.</li>
<li><a href="https://github.com/SuperV1234/cppcon2014">Quick game development with C++11/C++14</a> - CppCon 2014 talk by Vittorio Romeo.</li>
<li><a href="https://github.com/ldionne/hana-cppnow-2015">Presentation on Hana for C++Now 2015</a></li>
<li><a href="https://www.youtube.com/user/MeetingCPP/videos">Meeting Cpp</a> - Meeting C++ Youtube Channel</li>
</ul>
<h2 id="videos">Videos</h2>
<p><em>Fantastic C or C++ related videos.</em></p>
<ul>
<li><a href="https://github.com/fffaraz/awesome-cpp/blob/master/videos.md">List of C or C++ YouTube Videos</a></li>
<li><a href="https://www.youtube.com/playlist?list=PLCB9F975ECF01953C">Awesome C Programming Tutorials in Hi Def [HD]</a> - A collection of detailed C Programming Language Tutorials for Beginners and New Programmers.</li>
<li><a href="https://www.youtube.com/playlist?list=PL2F919ADECA5E39A6">C++</a> - by VoidRealms.</li>
<li><a href="https://www.youtube.com/playlist?list=PL2D1942A4688E9D63">C++ Qt Programming</a> - by VoidRealms.</li>
<li><a href="https://www.youtube.com/playlist?list=PLAE85DE8440AA6B83">C++ Programming Tutorials Playlist</a> - TheNewBoston Official Buckys C++ Programming Tutorials Playlist.</li>
<li><a href="https://www.youtube.com/playlist?list=PLF541C2C1F671AEF6">C++ Programming Tutorials from thenewboston</a> - These are all of thenewboston’s C++ programming tutorials.</li>
<li><a href="https://www.youtube.com/playlist?list=PLD0D54219E5F2544D">C++ GUI with Qt Playlist</a> - Official Playlist for thenewboston C++ GUI with Qt tutorials.</li>
<li><a href="https://www.youtube.com/playlist?list=PL78280D6BE6F05D34">C Programming Tutorials</a> - All of TheNewBoston’s C programming tutorials are right here.</li>
<li><a href="https://www.youtube.com/user/BoQianTheProgrammer/playlists">Bo Qian’s playlist</a> - Boost Library, C++ Standard Library, Modern C++, Advanced C++, Advanced STL, …</li>
</ul>
<h2 id="websites">Websites</h2>
<p><em>Useful C or C++ related websites.</em></p>
<ul>
<li><a href="https://isocpp.org/">Standard C++</a> :zap: - News, Status & Discussion about Standard C++.</li>
<li><a href="http://cppcon.org/">CppCon</a> - The C++ Conference.</li>
<li><a href="http://cppreference.com/">C++ reference</a> - C++98, C++03, C++11, C++14 reference.</li>
<li><a href="http://www.cbyexample.com/">C++ by Example</a> - Learn C++ by Example.</li>
<li><a href="http://www.cplusplus.com/">cplusplus.com</a> - The C++ Resources Network.</li>
<li><a href="http://c-faq.com/">C FAQ</a> - C frequently asked questions.</li>
<li><a href="http://www.parashift.com/c++-faq/">C++ FAQ</a> - C++ frequently asked questions.</li>
<li><a href="http://yosefk.com/c++fqa/">C++ FQA Lite</a> - C++ frequently questioned answers.</li>
<li><a href="http://www.gotw.ca/gotw/">Guru of the Week</a> - A regular series of C++ programming problems created and written by Herb Sutter.</li>
<li><a href="http://meetingcpp.com/">Meeting C++</a></li>
<li><a href="http://q.viva64.com/">C++ Quiz</a> - C++ quiz in which you propose to find errors in code fragments of open source projects.</li>
<li><a href="https://www.udemy.com/topic/C-plus-plus-tutorials/">Udemy C++ Courses and Tutorials</a></li>
<li><a href="http://cpphints.com/">C++ Hints</a> - Every business day hints about most often C++ mistakes and ways to solve them from PVS-Studio Team.</li>
<li><a href="https://hackr.io/tutorials/learn-c-plus-plus">C++ tutorial</a> - A user ranked online tutorial bank site displaying multiple courses to learn C++ from.</li>
</ul>
<h2 id="weblogs">Weblogs</h2>
<p><em>Useful C or C++ related weblogs.</em></p>
<ul>
<li><a href="https://codingforspeed.com/">Coding For Speed</a> - Coding For Speed DOT COM, Less Execution Time.</li>
<li><a href="http://ericniebler.com/">Eric Niebler</a></li>
<li><a href="https://blog.feabhas.com/">Sticky Bits</a></li>
<li><a href="http://pfultz2.com/blog/">Paul Fultz II’s Blog</a></li>
<li><a href="http://ridiculousfish.com/blog/posts/will-it-optimize.html">ridiculousfish</a> - Will It Optimize?</li>
<li><a href="http://blog.regehr.org/">Embedded in Academia</a></li>
<li><a href="https://arne-mertz.de/">Simplify C++</a></li>
<li><a href="https://www.fluentcpp.com/">Fluent C++</a></li>
<li><a href="https://www.bfilipek.com/?m=1">Bartek’s Coding Blog</a></li>
<li><a href="https://kennykerr.ca/articles/">Kenny Kerr</a></li>
<li><a href="https://herbsutter.com/gotw/">Sutter’s Mill</a></li>
<li><a href="https://vorbrodt.blog/">Vorbrodt’s C++ Blog</a></li>
<li><a href="https://foonathan.net/index.html">foonathan::blog()</a></li>
</ul>
<h2 id="other-awesome-projects">Other Awesome Projects</h2>
<p><em>Collection of useful codes, snippets, …</em></p>
<ul>
<li><a href="https://github.com/xtaci/algorithms">algorithms</a> - Algorithms & Data Structures in C++.</li>
<li><a href="https://github.com/fragglet/c-algorithms">c-algorithms</a> - C algorithms library.</li>
<li><a href="https://github.com/juniandotnet/cpp-awesome-pack">C++ Awesome Pack</a> - Contains some awesome c++ codes, packed in one.</li>
<li><a href="https://github.com/Bhupesh-V/30-seconds-of-cpp">30 Seconds of C++</a></li>
</ul>
<h1 id="other-awesome-lists">Other Awesome Lists</h1>
<p><em>Other amazingly awesome lists</em></p>
<ul>
<li><a href="https://github.com/jnv/lists">lists</a> - List of (awesome) lists curated on GitHub.</li>
<li><a href="https://github.com/bayandin/awesome-awesomeness">awesome-awesomeness</a> - A curated list of awesome awesomeness.</li>
<li><a href="https://github.com/sindresorhus/awesome">awesome</a> :zap: - A curated list of awesome lists.</li>
<li><a href="https://github.com/MattPD/cpplinks">C++ links</a> - A categorized list of C++ resources.</li>
<li><a href="https://getawesomeness.herokuapp.com/get/cpp">Awesome C++</a> - getAwesomeness()’s mirror.</li>
<li><a href="https://cpp.libhunt.com/">Awesome C++</a> - LibHunt’s mirror.</li>
<li><a href="https://notabug.org/koz.ross/awesome-c">Awesome C</a> 1</li>
<li><a href="https://github.com/aleksandar-todorovic/awesome-c">Awesome C</a> 2</li>
<li><a href="https://github.com/rigtorp/awesome-modern-cpp">Awesome Modern C++</a> - A collection of resources on modern C++.</li>
<li><a href="https://github.com/fenbf/AwesomePerfCpp">AwesomePerfCpp</a> - A curated list of awesome C/C++ performance optimization resources.</li>
<li><a href="https://github.com/vhf/free-programming-books">free-programming-books</a> - List of Freely Available Programming Books.</li>
<li><a href="http://inqlude.org/">Inqlude</a> - The Qt library archive.</li>
<li><a href="https://github.com/papers-we-love/papers-we-love">papers-we-love</a> - Papers from the computer science community to read and discuss.</li>
<li><a href="https://github.com/tayllan/awesome-algorithms">awesome-algorithms</a> - A curated list of awesome places to learn and/or practice algorithms.</li>
<li><a href="https://github.com/JanVanRyswyck/awesome-talks">awesome-talks</a> - A lot of screencasts, recordings of user group gatherings and conference talks.</li>
<li><a href="https://github.com/karan/Projects">Projects</a> - A list of practical projects that anyone can solve in any programming language.</li>
<li><a href="https://github.com/MaximAbramchuck/awesome-interviews">Awesome interview questions</a> - A list of lists of interview questions for the most popular technologies, including C and C++.</li>
<li><a href="https://github.com/nothings/single_file_libs">nothings/single_file_libs</a> :zap: - List of single-file C/C++ libraries.</li>
</ul>
<h1 id="contributing">Contributing</h1>
<p>Please take a quick gander at the <a href="https://github.com/fffaraz/awesome-cpp/blob/master/CONTRIBUTING.md">contribution guidelines</a> for details. Thanks to all <a href="https://github.com/fffaraz/awesome-cpp/graphs/contributors">contributors</a>; you rock!</p>
<h4 id="if-you-see-a-project-or-link-here-that-is-no-longer-maintained-or-is-not-a-good-fit-please-submit-a-pull-request-to-improve-this-document.-thank-you"><em>If you see a project or link here that is no longer maintained or is not a good fit, please submit a pull request to improve this document. Thank you!</em></h4>