GemRB is a portable open-source implementation of the Infinity Engine
A dead simple 2D game engine for Go
computer opponent for the board game Blokus
INSTEAD - Simple Text Adventure Interpreter.
A cross-platform port of Hexen II game.
Volume 2 of ChaosEsque Anthology
DOOM / Heretic / Hexen source port with enhanced graphics and UI
A cross-platform interpreter for many point-and-click adventure games
A traditional top-down OpenGL car racing game
Cross-platform port of Arx Fatalis, a first-person role-playing game
Game engine supporting many 3D/2D formats and graphic effects