C++

nloptstevengj/nlopt

A library for nonlinear optimization, providing a unified interface to multiple local and global optimization algorithms.

SVO: Semi-direct visual odometryuzh-rpg/rpg_svo

A fast semi-direct monocular visual odometry pipeline for robotics and computer vision applications.

FLTKfltk/fltk

A cross-platform C++ GUI toolkit for UNIX/Linux, Windows, and macOS with modern functionality and minimal bloat.

Protontimeplus-io/proton

A single C++ binary SQL engine for high-performance stream processing, analytics, observability, and AI/ML pipelines.

STARalexdobin/STAR

A fast RNA-seq aligner for mapping spliced transcript sequences to a reference genome.

RAPIDS cuGraphrapidsai/cugraph

A collection of GPU-accelerated graph analytics libraries for creating, manipulating, and executing scalable graph algorithms.

vkQuakeNovum/vkQuake

A Vulkan-based source port of id Software's Quake, offering enhanced graphics and performance over QuakeSpasm.

OpenXcomSupSuper/OpenXcom

An open-source clone of the classic 'UFO: Enemy Unknown' and 'X-COM: Terror From the Deep' strategy games.

pinvokedotnet/pinvoke

A comprehensive collection of P/Invoke method signatures for Windows APIs, packaged as NuGet libraries with type-safe wrappers.

far2lelfmz/far2l

A Linux port of FAR Manager v2, a powerful file manager and terminal multiplexer for Unix-like systems.

OpenTXopentx/opentx

Open-source custom firmware for RC transmitters, enabling advanced control and telemetry for model aircraft and drones.

polyscopenmwsharp/polyscope

A lightweight C++ and Python viewer for 3D data like meshes and point clouds with minimal integration effort.

Freeablowheybags/freeablo

A modern cross-platform reimplementation of the Diablo 1 game engine.

nhibernate-corenhibernate/nhibernate-core

A mature, open-source object-relational mapper for the .NET framework, enabling .NET applications to interact with databases using object-oriented paradigms.

Freeciv-webfreeciv/freeciv-web

An open-source turn-based strategy civilization-building game playable in HTML5 and WebGL browsers.

SharpDevelopicsharpcode/SharpDevelop

A free, open-source IDE for .NET programming languages including C#, VB.NET, F#, IronPython, and IronRuby.

rust-rocksdbrust-rocksdb/rust-rocksdb

A Rust wrapper for Facebook's RocksDB embedded key-value storage engine.

c-aresc-ares/c-ares

A C library for asynchronous DNS resolution, designed for non-blocking and parallel queries.

audiowaveformbbc/audiowaveform

A C++ command-line tool that generates waveform data and renders PNG images from MP3, WAV, FLAC, Ogg Vorbis, and Opus audio files.

flokiphilss/floki

A simple HTML parser for Elixir that enables search for nodes using CSS selectors.

BarotraumaRegalis11/Barotrauma

A 2D online multiplayer submarine survival game set in the icy oceans of Jupiter's moon Europa.

SRPCsogou/srpc

An enterprise-level RPC framework based on C++ Workflow, supporting SRPC, bRPC, tRPC, and Thrift protocols.

mrpt-serializationmrpt/mrpt

A comprehensive C++ toolkit for mobile robotics and computer vision research, providing libraries for SLAM, Bayesian filtering, and 3D geometry.

WebApiClientdotnetcore/WebApiClient

A high-performance REST API client library for .NET with interface-based declaration, AOT support, and advanced features.

PEGTLtaocpp/PEGTL

A zero-dependency C++ header-only parser combinator library for creating parsers according to Parsing Expression Grammars.

OpenFLopenfl/openfl

An open-source library for cross-platform creative development, inspired by Flash and AIR APIs.

bkcrackkimci86/bkcrack

A command-line tool that cracks legacy ZIP encryption using Biham and Kocher's known plaintext attack.

GNSS-SDRgnss-sdr/gnss-sdr

An open-source software-defined receiver for GPS, Galileo, GLONASS, and BeiDou signals, enabling custom GNSS processing.

SoLoudjarikomppa/soloud

A free, portable C/C++ audio engine for games with minimal dependencies and simple API.

HomeSpanHomeSpan/HomeSpan

An Arduino library for creating ESP32-based HomeKit devices that pair directly with Apple HomeKit via WiFi.

SameBoyLIJI32/SameBoy

A highly accurate Game Boy and Game Boy Color emulator written in portable C with native macOS and SDL frontends.

iceoryxeclipse/iceoryx

A true zero-copy inter-process-communication (IPC) middleware for high-performance data transfer between processes.

Allegro 5liballeg/allegro5

A cross-platform library for video game and multimedia programming with support for graphics, audio, input, and more.

iceoryxeclipse-iceoryx/iceoryx

A true zero-copy inter-process-communication (IPC) middleware for high-performance data transfer between processes.

Allegro 4.2liballeg/allegro5

A cross-platform game development library for C/C++ with multimedia, graphics, and input handling capabilities.

JSBsimJSBSim-Team/jsbsim

An open-source, multi-platform flight dynamics model (FDM) library for aircraft and rocket simulation, written in C++.