kugel is a perl/tk based game that is played by moving objects on the board and putting them into rows, columns, diagonals. Each time you create a line of the same objects, the score will increment with the number of objects you accomplished to line up. In the same time, the lined up "kugels" will disappear, so you can continue the game with more maneuver space on the board. Any time you fail to create a line of "kugels", new ones will appear on the board. Once the board is full, the game is over.
NetSpades is a networked implementation of the card game spades for one to four players. It features both a console version (using SLang) and an X version (using GTK). It includes messaging so players may chat back and forth during the game. The server can handle multiple simultaneous games.
RootPark is a Civilization-like game based on the history of computers and networks. You can play it with as many other players as you want since it has full networking capabilities. The game begins in 1960, when computers started to become very powerful. RootPark provides you the opportunity to experience these historical years, and a large range of possibilities. This source and binaries of the game will be available soon. It will be playable on Linux, BSD (and surely other UNIX like OSF1).
TwinTRIS is a multiplayer, portable, french tetris clone. It is a multiplayer game, using the same mode as X-blast (multiple windows on multiple displays but only one main process). It has been succesfully tested under both Solaris and Linux. It works under any resolution and screen depth and you can even "theme" it.