scene-oriented, flexible 3D engine (C++, Python, C#, Java)
GemRB is a portable open-source implementation of the Infinity Engine
TUI games designed as a classroom aid for teaching localization.
Blind Chess using Taiwan rule
PyMancala: A Python API for the Mancala game
The AWS GameKit Plugin for Unreal
ZED OS the clone of Windows XP
Character animation system for games and simulations.
... the open-source glide computer
GameServer is a sophisticated, game server designed for online games