Domin is a multiplayer(humans/AIs) board game where the goal is to dominate the board with pieces of your color (fire, water,wind, etc). Each piece effects some of its sourrounding pieces when placed and captures them to gain points.
Bridge Calculator to darmowy (freeware) program autorstwa Piotra Belinga wykonujący różne obliczenia związane z grą w brydża (min. rozwiązujący problem rozgrywki w otwarte karty).
GTK Cervi is clone of very good game called Cervi. It is a multiplayer game (on one machine) where players drive a worm and mustn't collide into anything.
Ultimate Basketball Challenge is a 5 on 5 basketball game for linux. It currently includes a basic ai, basic passing support, the ability to shoot the ball and to have it blocked.
Airstrike is a 2D dogfight game in the tradition of the Intellivision and Amiga games 'Biplanes' and 'BIP'. It features a robust physics engine and several other extensions of the original games.