G3dav (GNU 3D Anaglyphic Viewer) allows you to load, view and rotate 3 dimensional objects using cheap anaglyphic (red-cyan) glasses. This application is currently in a usable alpha-state, and I intend to add many features soon.
ChessY! is a Java application that allows you to visually review the game histories that you can email to yourself at the end of a Yahoo! online chess game.
A tool for securing DNS communications between a client and a DNS resolver.
A polyhedral extraction tool (PET).