I got this NASA - JPL Solar System Simulator from Catholic Sensabilities. It is incredibly cool and interesting. See any body in the solar system form any other body on any given date. It probably does other things as well, but I really wanted to share this one! Thanks, Todd.

Mr. Riddle, this is very cool. I tried viewing Earth from Mars and then Earth from Pluto, expecting there to be a big difference in the relative sizes, but I didn't see much difference. I must not have selected the right viewing options. But it's still very cool.