xcruise 0.30-8ubuntu1 (powerpc binary) in ubuntu hardy

 Xcruiser (formerly known as XCruise) allows you to fly over the file
 system in a 3D-view. Every file appears as a planet, directories
 appear as galaxies, and symbolic links appear as worm-holes.
 .
 You can fly about this space world by moving and clicking your mouse,
 or by using your keyboard.