Open Source

A little engine for little games, worlds, and stories

libGDX is a cross-platform Java game development framework based on OpenGL (ES) that works on Windows, Linux, macOS, Android, your browser and iOS.

Free and open source 2D and 3D game engine. Godot provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel.

The open source, real-time 3D engine. Create high-fidelity games and simulations and bride the physical and digital worlds to deliver amazing experiences.

Free cross-platform RTS engine providing "Age of Empires"- style game mechanics

Desktop and Mobile HTML5 game framework. A fast, free and fun open source framework for Canvas and WebGL powered browser games.

One framework for creating powerful cross-platform games. MonoGame is an Open Source implementation of the Microsoft XNA 4 Framework.

Fantasy computer for making, playing and sharing tiny games. There are built-in tools for development: code, sprites, maps, sound editors and the command line.

Stockfish is a powerful and open source chess engine. Stockfish is a 11-time winner of the Top Chess Engine Championship.