Open Source Computer Vision Library
Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data.
The Python programming language
Fast UTF-8 validation with Range algorithm (NEON+SSE4+AVX2)
OpenSSL is an open source project that provides a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is also a general-purpose cryptography library.
A library to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created.
A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features
gRPC is a modern, open source, high-performance remote procedure call (RPC) framework that can run anywhere. gRPC enables client and server applications to communicate transparently, and simplifies the building of connected systems.
A compression library
LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.
GoogleTest - Google Testing and Mocking Framework
Faiss is a library for efficient similarity search and clustering of dense vectors.
An open-source C++ library developed and used at Facebook. The library is UNSTABLE on Windows
{fmt} is an open-source formatting library providing a fast and safe alternative to C stdio and C++ iostreams.
Zstandard - Fast real-time compression algorithm
FlatBuffers is a cross platform serialization library architected for maximum memory efficiency. It allows you to directly access serialized data without parsing/unpacking it first, while still having great forwards/backwards compatibility.
Darknet is an open source neural network framework written in C and CUDA. You only look once (YOLO) is a state-of-the-art, real-time object detection system, best example of darknet functionalities.
A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)
Qt Base provides the basic non-GUI functionality required by all Qt applications.
Open standard for machine learning interoperability
Abseil is an open-source collection of C++ library code designed to augment the C++ standard library. The Abseil library code is collected from Google's own C++ code base, has been extensively tested and used in production, and is the same code we depend on in our daily coding lives.
ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
Yoga is a cross-platform layout engine which implements Flexbox
brpc is an Industrial-grade RPC framework using C++ Language, which is often used in high performance system such as Search, Storage, Machine learning, Advertisement, Recommendation etc. "brpc" means "better RPC".
Qt Base (Core, Gui, Widgets, Network, ...)
pybind11 is a lightweight header-only library that exposes C++ types in Python and vice versa, mainly to create Python bindings of existing C++ code
:zap: KCP - A Fast and Reliable ARQ Protocol
GLFW is a free, Open Source, multi-platform library for OpenGL, OpenGL ES and Vulkan application development. It provides a simple, platform-independent API for creating windows, contexts and surfaces, reading input, handling events, etc.
a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling.
Modern C++ toolkit containing machine learning algorithms and tools for creating complex software in C++
A single file C++11 header-only HTTP/HTTPS server and client library
About C++ Parallel Computing and Asynchronous Networking Engine
Approximate Nearest Neighbors in C++/Python optimized for memory usage and loading/saving to disk
Bullet Physics SDK: real-time collision detection and multi-physics simulation for VR, games, visual effects, robotics, machine learning etc.
An event notification library
Tiny cross-platform webview library for C/C++. Uses WebKit (GTK/Cocoa) and Edge WebView2 (Windows).
Perceptual JPEG encoder
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure.
Tensor library for machine learning
Drogon: A C++14/17/20 based HTTP web application framework running on Linux/macOS/Unix/Windows
Cap'n Proto serialization/RPC system - core tools and C++ library
Ultralightweight JSON parser in ANSI C
OpenGL Mathematics (GLM)
FreeRDP is a free remote desktop protocol library and clients
The ZeroMQ lightweight messaging kernel is a library which extends the standard socket interfaces with features traditionally provided by specialised messaging middleware products
C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
Z3 is a theorem prover from Microsoft Research
A fast multi-producer, multi-consumer lock-free concurrent queue for C++11
Fast Parallel Tasking Programming Library using Modern C++
Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more
JsonCpp is a C++ library that allows manipulating JSON values, including serialization and deserialization to and from strings. It can also preserve existing comment in unserialization/serialization steps, making it a convenient format to store user input files.
Point Cloud Library (PCL) is open source library for 2D/3D image and point cloud processing.
C++ implementation of the Google logging module
Asio is 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.
Extremely fast non-cryptographic hash algorithm
A cross-platform, linkable library implementation of Git that you can use in your application.
jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support
bzip2 is a freely available, patent free, high-quality data compressor. It typically compresses files to within 10% to 15% of the best available techniques (the PPM family of statistical compressors), whilst being around twice as fast at compression and six times faster at decompression.
libpng is a library implementing an interface for reading and writing PNG (Portable Network Graphics) format files
Extra CMake Modules (ECM), extra modules and scripts for CMake
A library to benchmark code snippets, similar to unit tests.
ChakraCore is an open source Javascript engine with a C API.
Portable, general-purpose utility library.
The POCO C++ Libraries are powerful cross-platform C++ libraries for building network- and internet-based applications that run on desktop, server, mobile, IoT, and embedded systems.
A high-performance multi-threaded malloc() implementation, plus some performance analysis tools.
A project for conversions between Traditional Chinese, Simplified Chinese and Japanese Kanji (Shinjitai)
Electronic Arts Standard Template Library. It is a C++ template library of containers, algorithms, and iterators useful for runtime and tool development across multiple platforms. It is a fairly extensive and robust implementation of such a library and has an emphasis on high performance above all other considerations.
An open source C++ engine for simulating rigid bodies in 2D
The pattern matching swiss knife
Capstone disassembly/disassembler framework for ARM, ARM64 (ARMv8), Alpha, BPF, Ethereum VM, HPPA, LoongArch, M68K, M680X, Mips, MOS65XX, PPC, RISC-V(rv32G/rv64G), SH, Sparc, SystemZ, TMS320C64X, TriCore, Webassembly, XCore and X86.
Reliable & unreliable messages over UDP. Robust message fragmentation & reassembly. P2P networking / NAT traversal. Encryption.
COLMAP is a general-purpose Structure-from-Motion (SfM) and Multi-View Stereo (MVS) pipeline with a graphical and command-line interface. It offers a wide range of features for reconstruction of ordered and unordered image collections. The software is licensed under the new BSD license.
JSON for Modern C++
A collection of tools and utilities that come with the Qt framework to assist developers in the creation, management, and deployment of Qt applications.
The C++ REST SDK is a Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. This project aims to help C++ developers connect to and interact with services.
A collection of C++ HTTP libraries including an easy to use HTTP server.
X.org macros utilities.
:computer: C++ Functional Terminal User Interface. :heart:
A library to render fonts.
libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems.
A multi core friendly rigid body physics and collision detection library. Written in C++. Suitable for games and VR applications. Used by Horizon Forbidden West.
HarfBuzz OpenType text shaping engine
The smallest header-only GUI library (4 KLOC) for all platforms.
OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.
Microsoft implementation of the Guidelines Support Library
The Quite OK Image Format for fast, lossless image compression
Draco is a library for compressing and decompressing 3D geometric meshes and point clouds. It is intended to improve the storage and transmission of 3D graphics.
Jsonnet - The data templating language
Widget toolkit and tools library for creating graphical user interfaces (GUIs) for cross-platform applications.
The Wren Programming Language. Wren is a small, fast, class-based concurrent scripting language.
C++ Requests is a simple wrapper around libcurl inspired by the excellent Python Requests project.
Open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, AAX and LV2 audio plug-ins and plug-in hosts
Light-weight, simple and fast XML parser for C++ with XPath support
Libxml2 is the XML C parser and toolkit developed for the Gnome project (but usable outside of the Gnome platform).
Halide is a programming language designed to make it easier to write high-performance image and array processing code on modern machines.
Higher level programming in C
A fast entity component system (ECS) for C & C++
http request/response parser for c
Hiredis is a minimalistic C client library for the Redis database.
yaml-cpp is a YAML parser and emitter in C++ matching the YAML 1.2 spec.
:herb: Fast streaming XML parser written in C99 with >90% test coverage; moved from SourceForge to GitHub
The fastest feature-rich C++11/14/17/20 single-header testing framework
X Window System unified protocol definitions
Duktape - embeddable Javascript engine with a focus on portability and compact footprint
An API and runtime that allows access to VR hardware from multiple vendors without requiring that applications have specific knowledge of the hardware they are targeting.
open Multiple View Geometry library. Basis for 3D computer vision and Structure from Motion.
iconv() text conversion.
The gflags package contains a C++ library that implements commandline flags processing. It includes built-in support for standard types such as string and the ability to define flags in the source file in which they are used. Online documentation available at:
The QuantLib C++ library
Duilib is a free open source DirectUI interface library under Windows. It is widely accepted by major Internet companies due to its simple and easy to expand design and stable and efficient implementation. It is widely used in IM, video client, stock market software, navigation software, and mobile phone assistive software. Duilib is still evolving, and will continue to improve in many aspects such as documentation, examples, animations, and rendering engines.
OpenH264 is a codec library which supports H.264 encoding and decoding. It is suitable for use in real time applications such as WebRTC.
GDAL is an open source MIT licensed translator library for raster and vector geospatial data formats.
Open Graphics Library (OpenGL)[3][4][5] is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics.
The reference implementation of the Linux FUSE (Filesystem in Userspace) interface
Detours is a software package for monitoring and instrumenting API calls on Windows. It is distributed in source code form.
The Computational Geometry Algorithms Library (CGAL) is a C++ library that aims to provide easy access to efficient and reliable algorithms in computational geometry.
the official Rust and C implementations of the BLAKE3 cryptographic hash function
A Hexagonal Hierarchical Geospatial Indexing System
Advanced 2D Plotting for Dear ImGui
A C++ standalone library for machine learning. CPU backend.
A C++ standalone library for machine learning. CUDA backend.
Mature and widely used Unicode and localization library.
a header-only C++11 serialization library (built in support for binary, XML and JSon)
A large scale non-linear optimization library
Range library for C++14/17/20, basis for C++20's std::ranges
Qt Declarative (Quick 2)
The OpenGL Extension Wrangler Library (GLEW) is a cross-platform open-source C/C++ extension loading library.
The password hash Argon2, winner of PHC
A regular expression library with O(length of input) match times that takes advantage of Intel hardware to provide blazing speed.
ClamAV is an open-source anti-virus toolkit.
A GNU framework to help produce multi-lingual messages.
The X Window System is a network-transparent window system that was designed at MIT.
A fast JSON parser/generator for C++ with both SAX/DOM style API <http://rapidjson.org/>
Header-only C++/python library for fast approximate nearest neighbors
Performance-portable, length-agnostic SIMD with runtime dispatch
Multi-Language Vulkan/GL/GLES/EGL/GLX/WGL Loader-Generator based on the official specs.
SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.
Collection of cross-platform one-file C/C++ libraries with no dependencies, primarily used for games
AsmJit is a lightweight library for machine code generation written in C++ language
Portable, high level programming interface to various calling conventions
HDF5 is a data model, library, and file format for storing and managing data
C++ tensors with broadcasting and lazy computing
This is a lightweight C++ option parser library, supporting the standard GNU style syntax for options
A conformant OpenGL ES implementation for Windows, Mac, Linux, iOS and Android.
A go-style coroutine library in C++11 and more
Metapackage for packages which provide BLAS
Qt Declarative (Quick 2)
Khronos-reference front end for GLSL/ESSL, partial front end for HLSL, and a SPIR-V generator.
Library for reading and writing streaming archives
An industrial-grade C++ implementation of RAFT consensus algorithm based on brpc, widely used inside Baidu to build highly-available distributed systems.
C++ logging library. It is powerful, supports asynchronous low latency, extendable, light-weight, fast performing, thread and type safe and consists of many built-in features. It provides ability to write logs in your own customized format. It also provide support for logging your classes, third-party libraries, STL and third-party containers etc.
Jsmn is a world fastest JSON parser/tokenizer. This is the official repo replacing the old one at Bitbucket
CLI11 is a command line parser for C++11 and beyond that provides a rich feature set with a simple and intuitive interface.
https://github.com/json-c/json-c is the official code repository for json-c. See the wiki for release tarballs for download. API docs at http://json-c.github.io/json-c/
Addons to QtCore
Cairo is a 2D graphics library with support for multiple output devices. Currently supported output targets include the X Window System (via both Xlib and XCB), Quartz, Win32, image buffers, PostScript, PDF, and SVG file output. Experimental backends include OpenGL, BeOS, OS/2, and DirectFB.
Metapackage for packages which provide LAPACK
A library that supports the manipulation of TIFF image files
A beautiful stack trace pretty printer for C++
Node Editor built using Dear ImGui
Totally open, royalty-free, highly versatile audio codec
Fast and lightweight x86/x86-64 disassembler and code generation library
The OpenSceneGraph is an open source high performance 3D graphics toolkit.
oneAPI Deep Neural Network Library (oneDNN)
Very fast and easy to use C++ micro web framework
A Compile time PCRE (almost) compatible regular expression matcher
Lossless compression algorithm, providing compression speed at 400 MB/s per core.
Configuration for SuiteSparse libraries
A date and time library based on the C++17 <chrono> header
A modern C++ network library based on libevent for developing high performance network services in TCP/UDP/HTTP protocols.
Jansson is a C library for encoding, decoding and manipulating JSON data
A set of libraries and drivers for fast packet processing
The projectM Music Visualizer. A cross-platform, OpenGL-based reimplementation of Milkdrop as a reusable library.
OpenMVS: open Multi-View Stereo reconstruction library
A library of C++ coroutine abstractions for the Coroutines TS
Configuration system
A high performance JSON library written in ANSI C
Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression.
The getopt and getopt_long functions automate some of the chore involved in parsing typical unix command line options.
Compression library with an API similar to that of zlib.
Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D.
This repo hosts the source for the DirectX Shader Compiler which is based on LLVM/Clang.
Performance instrumentation and tracing for Android, Linux and Chrome
g2o: A General Framework for Graph Optimization
Aubio is a tool designed for the extraction of annotations from audio signals. Its features include segmenting a sound file before each of its attacks, performing pitch detection, tapping the beat and producing midi streams from live audio.
The Boehm-Demers-Weiser conservative C/C++ Garbage Collector (bdwgc, also known as bdw-gc, boehm-gc, libgc)
Immediate mode 3D gizmo for scene editing and other controls based on Dear ImGui
Pistache is a modern and elegant HTTP and REST framework for C++. It is entirely written in pure-C++11 and provides a clear and pleasant API
Advanced internationalization framework
Behavior Trees Library in C++. Batteries included.
OpenAL Soft is an LGPL-licensed, cross-platform, software implementation of the OpenAL 3D audio API.
Universally unique id library
Xlib-based library for common extensions to the X11 protocol
an open source implementation of the actor model for C++ featuring lightweight & fast actor implementations, pattern matching for messages, network transparent messaging, and more.
Dirent is a C/C++ programming interface that allows programmers to retrieve information about files and directories under Linux/UNIX. This project provides Linux compatible Dirent interface for Microsoft Windows.
An Open-Source subdivision surface library.
Activity indicators for modern C++
Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12, Chromium, Redis and WebKit/Safari
This project supports extending (hooking) unmanaged code (APIs) with pure managed ones, from within a fully managed environment on 32- or 64-bit Windows Vista x64, Windows Server 2008 x64, Windows 7, Windows 8.1, and Windows 10.
A dbg(...) macro for C++