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.
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.
Jin is a Java client for various chess servers. It currently supports the Internet Chess Club (chessclub.com) and the Free Internet Chess Server (freechess.org) but is designed to be able to support any chess server.
You are mage on small platform and you have to defeat all your enemies. You have to learn more and more spells, because your enemies are strong. Are you good enough?