UCI chess engine
GUI of chess
Chess Database and Toolkit program
Chess Database and PGN viewer
Chess application whichs allows working with chess PDF books and PGNs.
A GNU/Linux operating system accessible for visually impaired.
Zoomable user interface (ZUI) with file manager, file viewers and more
A free Chess program for Windows with a large set of features
ChessMD is a Qt-based chess game viewer with engine analysis
A new -better- chess variant , *Fair-Chess* ! (also with handicaps)
Blind Chess using Taiwan rules
javascript chess games viewer for websites, blogs and live broadcasts
Edit diagram.sty LaTeX diagrams
Chess program
Elo Calculator - strictly implemented FIDE Rating Regulations
A promising chess program