Palomino Flight Simulator
DISCONTINUED -- NOT SUPPORTED
Palomino Flight Simulator (Palomino3) is an open-source flight simulator.
Palomino can simulate flight of various aircraft: Spitfire, P-51 Mustang, F-82 Twin Mustang, F-14 Tomcat, F-15 Eagle, Su-37 Flanker, etc. Just for fun, can try landing a SR-71 BlackBird or NASA Space Shuttle on USS Nimitz aircraft carrier. Palomino never progressed far beyond prototype stage, but enough was developed for a basic game mission against a SAM/radar site.
Old version is available for download at
www.palomino3d.org (defunct, this author used to own that domain)