Toga II is a chess program, derivative of Fruit created by Thomas Gaksch. It has more chess knowledge and perhaps a better search algorithm. It is based on Fruit 2.1 and is free.
Lords of Doom is a software game still in development.
It's a turn-based strategy game, that can be played alone (against AI) or against other through a network (local or internet).
Shadows Rising is a RPG Game Engine written in PHP. The Game Engine is aimed at enabling users to install a number of Game Modules which will use the Engine to present an RP game to players on the user's site. Additionally the project will be adding editing tools so that users can create their own custom RP games.
The game is hosted online, and can be installed on any PHP enabled server supporting either MySQL or PostgreSQL
One of the best space simulation is available also in a Linux version.
Thirty-two years have passed since the Great war. Terrans and Vasudans have formed a new alliance. But new threats are lurking around.