Build cross-platform desktop apps with JavaScript, HTML, and CSS

Godot Engine – Multi-platform 2D and 3D game engine

Tesseract Open Source OCR Engine (main repository)

Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies

The Swift Programming Language

Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)

Emscripten: An LLVM-to-WebAssembly Compiler

Karabiner-Elements is a powerful tool for customizing keyboards on macOS

🎮 A step-by-step guide to implementing SSAO, depth of field, lighting, normal mapping, and more for your 3D game.

Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WebGL2

Simple, secure & standards compliant web server for the most demanding of applications

ESP8266 core for Arduino

Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

Frame profiler

Tiny cross-platform webview library for C/C++. Uses WebKit (GTK/Cocoa) and Edge WebView2 (Windows).

A PSP emulator for Android, Windows, Mac and Linux, written in C++. Want to contribute? Join us on Discord at https://discord.gg/5NJB6dD or just send pull requests / issues. For discussion use the …

🍃 Organic Maps is a free Android & iOS offline maps app for travelers, tourists, hikers, and cyclists. It uses crowd-sourced OpenStreetMap data and is developed with love by the community. No ads, …

Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more

Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.

Bringing Characters to Life with Computer Brains in Unity

Complete Open Source and Modular solution for MMO

OpenMW is an open-source open-world RPG game engine that supports playing Morrowind. Main repo and issue tracker can be found here: https://gitlab.com/OpenMW/openmw/

The Forge Cross-Platform Framework PC Windows, Steamdeck (native), Ray Tracing, macOS / iOS, Android, XBOX, PS4, PS5, Switch, Quest 2

A fast, small, safe, gradually typed embeddable scripting language derived from Lua

Game engine

🗺️ MAPS.ME — Offline OpenStreetMap maps for iOS and Android

scene-oriented, flexible 3D engine (C++, Python, C#, Java)

Half-Life 1 engine based games

Async Web Server for ESP8266 and ESP32

A lightweight game engine written in modern C++