NovaChess A great program to play chess against the computer. The game offers five different levels: very easy to very difficult. Download it for free.
Chinese Chess Play Chinese Chess against computer opponent
AlphaChess AlphaChess is a superb chess game that allows you to challenge other players either in a local game (against the computer or another player on the same computer) or a network game.
Net Blitz Multiplayer chess game with bughouse support
GameBox Play all the popular games, PacMan, Solitaire, PicPuzzle, Tetris, Worm, Pyramid, Black Jack, Yahtzee, Chess, Checkers, Puzzles etc. Post your hisocre and see if anyone can beat it.