UCI chess engine
Tool for chess teachers to create PDF files with chess diagrams in it
Batch tools for creating Polyglot books and PGN-based statistics.
NetChess to play between two players over net or internet
Extensive Java chess database libraries.
Java Chess Engine
A weak open source java chess engine
free open-source chess engine interface
OpenGL chess game
A powerful chess engine written in C++
Port of UCI to Javascript
Take the chess graphism, and use it with a chess engine.
A Java chess engine using xboard protocol
A chess application : game with human and/or computer
A simple network chess game
Yet Another Chess ENgine