UCI chess engine
Chess Database and PGN viewer
Portable UCI- and XBoard-compatible chess engines.
Chess Database and Toolkit program
A cross-platform chess game.
simple chess game written in C
ChessMD is a Qt-based chess game viewer with engine analysis
Batch tools for creating Polyglot books and PGN-based statistics.
A promising chess program
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Java Schach Turnierverwaltung / Java Chess Tournament Management
SJCE - free portable cross-platform graphical chess game, 100% Java.
Chess Database Application
Basic console interface for 3 player chess in a 7x7x7 cube.
A JavaScript game library to quickly develop board games for the web
Extensive Java chess database libraries.