UCI chess engine
GUI of chess
Chess Database and Toolkit program
Chess application whichs allows working with chess PDF books and PGNs.
Chess Stats is a slightly different way to analyze your chess games.
computer opponent for the board game Blokus
A free Chess program for Windows with a large set of features
A new -better- chess variant , *Fair-Chess* ! (also with handicaps)
A simple tool to allow Chessmaster 10/11 bot customizations
Chess for the Blind for the JAWS or NVDA Screen Readers
The forever free, ad-free and open source chess server