Mangos ZERO is a server for World of Warcraft
A cross-platform PSP emulator
SDL library for Android, including several games.
Voxel game-creation platform with easy modding and game creation
A certain block game
Desktop/Android/HTML5/iOS Java game development framework
Stream switch games to your PC via USB or network
UCI chess engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Powerful, mature open-source cross-platform game engine for Python
The game engine for everyone
Home theater software and entertainment hub for digital media
Open-source engine for Heroes of Might and Magic III
Cocos simplifies game creation and distribution with Cocos Creator
Solar2D Game Engine main repository (ex Corona SDK)
Multi-platform 2D and 3D game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
3D Engine c++
Android, UIQ 3.0, Series 60 Edition 5 open-source software
... the open-source glide computer
Orx: Data-Driven Game Engine
A catalog of free games relative to the Qore World universe.
A promising chess program
3D modeler, 3D game maker, 3D demo maker