UCI chess engine
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Chess training program playing gambits
NetChess to play between two players over net or internet
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
a UCI chess engine
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SJCE - free portable cross-platform graphical chess game, 100% Java.
Python chess engine
A console/ncurses chess engine frontend and PGN editor.
The forever free, ad-free and open source chess server
EXCEL VBA chess engine with chess board
Extensive Java chess database libraries.
Chess Database application
Java Chess Engine
icsdrone is an interface between a chess server and a chess engine
The world's smallest chess playing program just got smaller!