The game engine for everyone
Desktop/Android/HTML5/iOS Java game development framework
Free and open source real-time strategy game
Moonlight port for Nintendo Switch
A game of dungeon exploration, combat and magic
Cross-Platform C++ 2D/3D game engine
Fast PlayStation 1 emulator for x86-64/AArch32/AArch64
A free/open source client and automation tool for Ragnarok Online
An open source flight dynamics & control software library
A tool for recompiling Xbox 360 games to native executables
X-Plane plugin that displays a tablet to aid VR usage
Voxel game-creation platform with easy modding and game creation
JK's Save Manager Switch Edition
Powerful, mature open-source cross-platform game engine for Python
Open-source engine for Heroes of Might and Magic III
Diablo build for modern operating systems
Home theater software and entertainment hub for digital media
dhewm 3 main repository
Solar2D Game Engine main repository (ex Corona SDK)
A game engine with an emphasis on real-time cutting-edge solutions
Create custom themes for the Nintendo Switch
UZDoom is a feature centric port for all Doom engine games
Parse and serialize minecraft packets, plus authentication
Cross-platform 2D and 3D game engine with modular architecture
Voxel game engine in C++ with OpenGL