Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
Chessmaster - Chessmaster is a chess playing computer game series which is now owned and developed by Ubisoft.
Shredder Chess - Shredder chess download. World champion computer chess program. Best chess software
Listudy - Improve you chess game with spaced repetition.
Chess.com - Play chess on Chess.
Scid vs. PC - Chess database and playing program.