12 Strong Free and Open Source Chess Engines - LinuxLinks

Computer chess has been a phenomenal success, aiding chess analysis, and allowing players to play when no human opponents are available.

Stockfish NNUE - Chessprogramming wiki

Booot 7.1 - released.

10 Strongest Free Chess Engines [all above 3000 ELO] - TheChessWorld

Free UCI-Compatible Chess Programs for the Stockfish Engine - HobbyLark

Our Favourite Open Source Chess Websites

doc/.text/game at master · AGNUcius/doc · GitHub

Best Free and Open Source Alternatives to Apple Numbers - LinuxLinks

Free UCI-Compatible Chess Programs for the Stockfish Engine - HobbyLark

Crafty - computer chess program - LinuxLinks

Zentropy - UCI chess engine GUI for Windows