Algodoo

This module can be smashed up, increasing the potential for destroyable spaceships and appealing-looking space battles, even at a high physics framerate (at which conventional destruction doesn't work due to the lack of parts phasing through each other).

Feel free to make an upload your own scenes using this. You don't even need to give credit, though it would be nice if you did.

New: The module is now harder to break.