UCI chess engine
Sandbox video game with a powerful physics engine
Chess training program playing gambits
Chess Database and PGN viewer
NetChess to play between two players over net or internet
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Chess program
SJCE - free portable cross-platform graphical chess game, 100% Java.
Python chess engine
The forever free, ad-free and open source chess server
EXCEL VBA chess engine with chess board
Chess Database application
Extensive Java chess database libraries.
Java Chess Engine
The world's smallest chess playing program just got smaller!
Next generation web chess club
Chess engine, currently in development