RealFlight G3 R/C Flight Simulator

By far the most realistic flight simulator on the market, and perhaps the best known, it's also a little expensive -- but well worth it for serious flight training. RealFlight from Great Planes has such an extensive model RC aircraft library to choose from that you won't grow tiresome of this software for quite awhile. It comes complete with a transmitter controller by Futaba, and such features as training aids, a virtual coach, night flying mode, active and reactive backgrounds and object, and multiplayer modes. Although G4 is now out, this gallery is from the demo version of G3.