C++

PortAudioPortAudio/portaudio

A cross-platform, open-source C library for real-time audio input and output with support for multiple host APIs.

libsoundioandrewrk/libsoundio

A C library for cross-platform real-time audio input and output, supporting JACK, PulseAudio, ALSA, CoreAudio, and WASAPI.

Oniondavidmoreno/onion

A C library for creating simple HTTP servers and web applications, designed to embed web functionality into existing programs.

KimeraMIT-SPARK/Kimera

A C++ library for real-time metric-semantic SLAM, building semantically annotated 3D meshes from camera and IMU data.

omplompl/ompl

An open-source sampling-based motion planning library with over 40 algorithms and SIMD-accelerated performance for robotics and autonomous systems.

PicoHTTPParserh2o/picohttpparser

A tiny, primitive, fast HTTP request/response parser written in C, designed to be stateless and memory-efficient.

Squeezelite-esp32sle118/squeezelite-esp32

ESP32-based audio streaming software supporting multi-room sync, AirPlay, Bluetooth, and LMS integration.

Vanaradahall/Vanara

A comprehensive set of .NET libraries providing P/Invoke calls and wrappers for native Windows APIs.

Oryol Inputfloooh/oryol

A small, portable and extensible C++ 3D coding framework for cross-platform graphics applications.

Oryolfloooh/oryol

A small, portable and extensible C++ 3D coding framework for cross-platform graphics applications.

OpenImageDenoiseOpenImageDenoise/oidn

An open-source library of high-performance, high-quality denoising filters for ray-traced images using deep learning.

TileDBTileDB-Inc/TileDB

An embeddable C++ storage engine for dense and sparse multi-dimensional arrays, dataframes, and key-value stores.

fast_floatfastfloat/fast_float

A high-performance C++ library for parsing floating-point and integer numbers from strings, 4x to 10x faster than strtod.

DSPFiltersvinniefalco/DSPFilters

A C++ template library for designing and implementing multichannel IIR filters with various response types and seamless parameter interpolation.

Nezprime31/Nez

A free, feature-rich 2D framework built on top of MonoGame and FNA for game development.

mJScesanta/mjs

A minimal embedded JavaScript engine for microcontrollers with seamless C/C++ interoperability.

Visual Doom AI Competitionmwydmuch/ViZDoom

A platform for developing AI bots that play Doom using visual information, designed for reinforcement learning research.

crypto-algorithmsB-Con/crypto-algorithms

Basic implementations of standard cryptography algorithms for educational and pragmatic purposes.

LuaSocketdiegonehab/luasocket

Network extension library for Lua providing TCP/UDP transport and common internet application functions.

vizzuvizzuhq/vizzu-lib

An open-source JavaScript/C++ library for creating animated data visualizations and interactive data stories.

xcbuildfacebook/xcbuild

An Xcode-compatible build tool for faster incremental builds on macOS, Linux, and Windows.

git2golibgit2/git2go

Go bindings for libgit2, providing native Git functionality in Go applications.

termboxnsf/termbox

A minimal C library for creating text-based user interfaces with a simple cell-based terminal abstraction.

Torque3DTorqueGameEngines/Torque3D

An open-source C++ engine for 3D game development, offering a full suite of tools and cross-platform support.

Restbedcorvusoft/restbed

An enterprise-grade C++ framework for building asynchronous, secure, and scalable HTTP/RESTful server applications.

MimeKitjstedfast/MimeKit

A high-performance .NET library for creating and parsing MIME messages with support for S/MIME, PGP, DKIM, TNEF, and Unix mbox.

µStreamerpikvm/ustreamer

A lightweight, fast MJPEG-HTTP video streamer for V4L2 devices, optimized for high-resolution, high-FPS streaming.

bcrypt-rubycodahale/bcrypt-ruby

A Ruby binding for the OpenBSD bcrypt() password hashing algorithm to securely store user passwords.

ClassiCubeClassiCube/ClassiCube

A custom Minecraft Classic client written in C from scratch, offering enhanced performance and cross-platform support.

moosefsmoosefs/moosefs

An open-source, petabyte-scale, fault-tolerant distributed file system with POSIX compliance and easy scalability.

Native File Dialogmlabbe/nativefiledialog

A tiny, portable C library for invoking native file open, save, and folder select dialogs across Windows, macOS, and Linux.

JA4+FoxIO-LLC/ja4

A suite of network fingerprinting standards for TLS, TCP, HTTP, SSH, and other protocols to facilitate threat detection and security analysis.

memory-allocatorsmtrebi/memory-allocators

A collection of custom memory allocators in C++ designed to outperform standard malloc for specific allocation patterns.

Corangeorangeduck/Corange

A pure C game engine and framework for cross-platform 2D/3D game development with modern graphics features.

otter-browserOtterBrowser/otter-browser

A lightweight web browser that recreates the classic Opera 12 UI and spirit using Qt5, focused on power users.

libnfcnfc-tools/libnfc

A free, platform-independent library for accessing Near Field Communication (NFC) devices from userspace applications.