CheckerBoard
Very strong free checkers game. Play against the computer opponent, save, load and analyze your games.

Nemesis Checkers
Checkers game for PC with 8 piece endgame database, covering a perfect knowledge of 440,000,000,000 checker positions.

Buggy - Draughts program
World-class International Draughts-playing program. Played the first Man-Machine match in the history of the game against Grand-Master N'Diaga Samb (world number 8).