A cross-platform PSP emulator
Open-source engine for Heroes of Might and Magic III
SDL library for Android, including several games.
Desktop/Android/HTML5/iOS Java game development framework
A certain block game
UCI chess engine
Stream switch games to your PC via USB or network
Voxel game-creation platform with easy modding and game creation
The game engine for everyone
Home theater software and entertainment hub for digital media
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Solar2D Game Engine main repository (ex Corona SDK)
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform 2D and 3D game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Android, UIQ 3.0, Series 60 Edition 5 open-source software
3D Engine c++
... the open-source glide computer
computer opponent for the board game Blokus
3D modeler, 3D game maker, 3D demo maker
GemRB is a portable open-source implementation of the Infinity Engine
A promising chess program
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
A catalog of free games relative to the Qore World universe.