Dan's Orbiter page - http://orbiter.dansteph.com/
Find the module plug-in that enables sound in the simulation. Includes a support forum for frequently asked questions and general discussion. |
Orbit Hangar Mods - http://www.orbithangar.com/
A general repository of contributions submitted by third party add-on developers. |
Orbital Mods - http://www.orbitmods.com/
An addon repository focused in the Russian space flight program. It also features a database of known bugs in the simulator. |
Orbiter - A Free Space Flight Simulator - http://www.medphys.ucl.ac.uk/~martins/orbit/orbit.html
A realistic 3D flight simulator that uses proper physics for the modelling of planetary motion, gravitational fields, free space, and atmospheric flight. |
Orbiter Mars - http://www.orbitermars.co.uk/
Includes concise tutorials that explain the procedures and the planning stage of interplanetary missions. |