Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
Chess.com - Play chess on Chess.
Puzzle Strike - Puzzle Strike is a Puzzle, Board, Single and Multiplayer video game created and published by Sirlin Games.
Fritz - Fritz is the world’s most popular chess program, developed by ChessBase, “the world's leading...
Lux Delux - Lux Delux is a game of strategy and domination inspired by the board game Risk.