The Unofficial XCSoar Manual
Tools/FlightTrack
From XCSoar
Mac OS X FlightTrack is software to review your IGC and other file format plans against Terrain and Toplogy. It automatically downloads and manages maps, sattelight images, terrain and toplogy to map the files you download and is very easy to use. It does not however provide analasys in the form of best distance.
http://flighttrack.sourceforge.net/
