UCI chess engine
Chess training program playing gambits
Chess Database and PGN viewer
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
NetChess to play between two players over net or internet
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
A collection of patches for the upstream Scid vs PC project.
Chess program
a UCI chess engine
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