Real Mah Jongg is a social game that originated in China thousands of years ago. Four players, named after the four winds, take tiles from a wall in turn. The best tiles are made of ivory and wood; they click pleasantly when you knock them together. Computer Solitaire Mah Jongg (xmahjongg being one of the sillier examples) is nothing like that but it's fun, or it must be, since there are like 300 shareware versions available for Windows. This one is for X11 and it's free.
GNUSTEP Live CD contains a lot of software for GNUstep, a free implementation of the OPENSTEP framework (which is also directly used in Mac OS X as Cocoa). It includes excellent applications for RAD (GORM and ProjectCenter). The CD is available for i486, AMD64, Apple Mac PowerPC, and Sun UltraSPARC computers.
Su Doku Live is a Su Doku game which is playable in realtime (i.e., players connect to each other) over the Internet or a LAN. It has Cooperative (in which all can see other players' selections) and Competitive (you can see where opponents placed numbers but do not see the numbers) modes. Extras include a puzzle generator, error detection, a Su Doku builder, and a solver.
KaPooka is an animated logic game for SDL. It's kind of a cross between Sokoban and Pengo with regards to gameplay. You move your red blobby around, pushing the green blobbies out of the way and finding the exit. The game currently consists of 30 levels. Anyone that feels like contributing other levels is most welcome.
Jetrix is a TetriNET server designed for maximum scalability, extensibility, and ease of use. It features a Web-based administration console and a simple API to let developers add custom commands or change the channels' behavior with little knowledge of the server's inner functioning. The ambitious goal of this project is to create the ideal platform for TetriNET programmers.