The Automagical Sudoku Solver attempts to solve Sudoku puzzles for you using various techniques. Although it has come a long way, there are still some tough puzzles that it can't solve. Puzzles are entered in the text file provided, and "ass < foo" will solve your puzzle in a pinch.
Hex-a-hop is a puzzle game based on hexagonal tiles. There is no time limit and no real-time elements. The objective is simply to destroy all the green hexagonal tiles on each of the 100 levels. As you progress through the game, more types of tiles are introduced, which make things more difficult and interesting (hopefully).
Berusky is a logic game that is based on an ancient puzzle named Sokoban. The old idea of moving boxes in a maze has been expanded with new logic items such as explosives, stones, special gates, and so on. In addition, up to five bugs can cooperate and be controlled by the player.
Crystal Core is a FPS quest-based game written with Crystal Space and Crystal Entity Layer. The game is based on a science fiction story. The player and his or her companions crash on an alien planet where they discover that the original intelligent inhabitants are now extinct due to an invasion of semi- primitive aliens from a distant planet. Your goal is either to destroy all aliens or escape the planet alive. To accomplish these goals you have to use alien technology and try to interface it with the broken ship that you arrived with.