3D Martian Flyover Movies
Matthew Sparkes writes "NASA has created two virtual flyovers of the Mars rover landing sites using 3D imagery from the Mars Reconnaissance Orbiter (New Scientist story here). The images were made using the most powerful camera ever sent to another planet, MRO's High Resolution Imaging Science Experiment (HiRISE). The three-dimensional information is obtained by taking pairs of images from slightly different vantage points as the spacecraft orbits the Red Planet."
If that's your thing, you should check out Terragen, which is free for personal use. There are even people who have already imported the geological data for Mars, for National Geographic no less. It's pretty-pretty.
You can fly over all of Mars in realtime 3D/OpenGL with data from the Mars Orbiter MOLA experiment. These flyovers have much nicer hi-res textures, though.
http://www.antlersoft.com/demo3d/mars/index.html/
Runs in Linux and MS-Windows and it's open-source, as well.