Cross platform (lin/win/mac) geographical information system (GIS)
... the open-source glide computer
Google Earth Enterprise - Open Source
Interactive visualization of plate tectonics.
Geostatistics and geosciences modeling software
Automatic delineation of forest borderlines
OTB is an open-source C++ library for remote sensing images processing
Syntax2D (latest ver. 1.3.7.0)
NOTE: Use Fltk_Contour insted this code!