UCI chess engine
ChessMD is a Qt-based chess game viewer with engine analysis
Chess engine written in Pascal with an UCI interface.
Chess Database and PGN viewer
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
NetChess to play between two players over net or internet
Chess program
SJCE - free portable cross-platform graphical chess game, 100% Java.
The forever free, ad-free and open source chess server
Chess Database application
Extensive Java chess database libraries.
Java Chess Engine
Next generation web chess club
A weak open source java chess engine
free open-source chess engine interface
A powerful chess engine written in C++
Port of UCI to Javascript
OpenGL chess game
Take the chess graphism, and use it with a chess engine.
A Java chess engine using xboard protocol