GCompris is an educational software suite with numerous activities for children aged 2 to 10. Some of the activities are game-orientated, but nonetheless still educational. These include computer discovery (keyboard, mouse, different mouse gestures), algebra (table memory, enumeration, double entry table, mirror image), science (the canal lock, the water cycle, the submarine, electric simulation), geography (place the country on the map), games (chess, memory, connect 4, oware, sudoku), reading practice, and others (learn to tell time, puzzles of famous paintings, vector drawing, cartoon making, etc.). It currently offers in excess of 100 activities, and more are being developed.
PyTraffic is a Python version of the board game Rush Hour created by Binary Arts Coporation. The goal is to remove the red car out of the grid through the slot on the right. To do this you have to slide the other cars out of the way. PyTraffic comes with about 19,000 puzzles ranging from intermediate to expert, and has an extremely smart hint facility which is able to find the best move in every position.
Online Cardgame System is a free implementation of online card games such as are found at Yahoo! Games. The server is portable and has been tested under both Linux and Win32. The client is currently only available for Win32. Games are dynamically loaded modules, so new games can be added without recompiling the server.