UCI chess engine
Portable UCI- and XBoard-compatible chess engines.
Chess analysis, training and testing for Windows.
ChessMD is a Qt-based chess game viewer with engine analysis
Chess Database and PGN viewer
The SCID 5 format in a clean, deterministic, modular architecture
Scripts and tools for building and testing chess engines.
A free Chess program for Windows with a large set of features
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
A new -better- chess variant , *Fair-Chess* ! (also with handicaps)
NetChess to play between two players over net or internet
A simple tool to allow Chessmaster 10/11 bot customizations
a UCI chess engine
Chess program
SJCE - free portable cross-platform graphical chess game, 100% Java.
A console/ncurses chess engine frontend and PGN editor.
Chess for the Blind for the JAWS or NVDA Screen Readers
The forever free, ad-free and open source chess server