scene-oriented, flexible 3D engine (C++, Python, C#, Java)
GemRB is a portable open-source implementation of the Infinity Engine
A promising chess program
PyMancala: A Python API for the Mancala game
Urho3D Game engine
The AWS GameKit Plugin for Unreal
Blind Chess using Taiwan rule
ZED OS the clone of Windows XP
Character animation system for games and simulations.
Asphyre is a cross-platform framework for Delphi and FreePascal.
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A simple 2D platformer, written in python2.7
The map viewer application for Greencubes minecraft server
A powerful cross-platform and open-source 3-D rendering engine.
... the open-source glide computer