Orbital Flight

This game is written under python (with pygame and numpy) and is based on a n-body simulation. Pilot your spaceship and see if you can land on the moon or meet a satellite on low orbit! You can simulate tens of planets, asteroids, and check basic orbital mechanics.
There are configuration files to simulate the full solar system, including the biggest satellites, and it is easy to create more.
In short, you can use this software to pilot a spaceship and see all the challenges of a mission to moon or mars, or simulate n-body systems up to 100 bodies and see how they evolve in time.