Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
XBoard - XBoard, also known as WinBoard on Microsoft operating systems, is a free graphical user interface...
ChessDB - ChessDB - a free Chess database for Mac OS X, Windows, Linux, and UNIX - like ChessBase, but better
Chess.com - Play chess on Chess.
Bovo - Bovo is a Gomoku-like game for two players, where the opponents alternate in placing their...
DecodeChess - AI chess tutor and analysis