Assorted

• Kepler
  • Some orbital tools to allow us to simulate satellites and rockets and asteroids
• Payload Calculator
  • Calculate payload mass for rockets based on various parameters (rocket fuel, thrust, atmospheric drag, surface gravity etc)
  • source
• 42
  • A general-purpose simulation of spacecraft attitude and orbit dynamics. Its primary purpose is to support design and validation of attitude control systems, from concept studies through integration and test