jDip is a tool for mapping, managing, and adjudicating Diplomacy games. It has a simple but powerful graphical interface, with a richly customizable map display. Windows, Linux, Mac OS X, and Solaris are supported. Over 25 variants are supported.
Cluedo, the murder mystery game in Java. Includes several maps (and mapping tools), AI players, configurable cards, sounds and multiple languages. In the pipe-line: networking support, improved graphics, and advanced artificial intelligence.