Orbit Xplorer site license
Orbit Xplorer is an easy-to-use orbit simulator suitable for high school, college and university students and teachers, or anyone with an interest in physics and astronomy. For the first time you can do "lab exercises" in gravitational physics! If you are solving problems involving orbits of satellites, planets or stars it will be exciting to simulate the problem in Orbit Xplorer and compare its numerical output with your own solutions.
Orbit Xplorer comes with more than 40 premade simulations which you may modify as you like. Each simulation includes one or more suggested activities of varying difficulty. You may also construct and save your own simulation.