NASA Lunar Electric Rover: Lets you simulate the various tasks and challenges involved in supporting a functioning lunar outpost. As Jesus notes, it's also a heartbreaker:

Sadly, and since there are not going to be any NASA missions to the moon, we know that these skills would be useless. Unless that, by "NASA Lunar Electric Rover Simulator" they really mean "Soyuz Spacecraft Push Some Russian Buttons Simulator."

In any case, go to the App Store and enjoy the free game, because the real thing is not going to happen.