TuxMinds is a visial program designer for autonomous robots. It supports ASURO, NxT, RcX and some extension hardware can be integrated, freely configurable models. A tutorial video is available, and Debian packages or an ISO image.
JSkat is a card game. It's implemented in Java, works with the International Skat Server to allow playing against real players or Skat AI engines.
TV-Browser is a Java-based electronic TV program guide browser. Per default it looks like a classic paper TV periodical, and it can be extended with new source plugins to the existing 1000 TV stations and 100 radios.