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Orbiter official site
Orbit Hangar Mods
Mustard’s Homepage
Kulch’s Orbiter Page
AVSim Library
Dan’s Orbiter Page
Project Apollo - NASSP
Greg Burch’s Addons
SIMCOSMOS
SIMCOSMOS – Orbiter community links
Orbiter Forums
Elite Games Orbiter Forum (Russian)
Spaceflight related links
Encyclopedia Astronautika
Russian Space Web
RKK Energia official site
Buran Space Shuttle (Russian)
Cosmonautics News (Russian)
Space Epizodes (Russian)
Complete list of Astronauts and Cosmonauts