GNOME Sudoku is a GNOME-based puzzle game based on Sudoku, a popular Japanese logic game. It provides a simple interface for playing, saving, printing, and solving Sudoku puzzles and generates symmetrical puzzles with unique solutions. It features support for infinite undo, a rating of the difficulty of games, and a memory of all games you play.
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.