idrisi32
Idrisi is the industry leader in raster analytical
functionality covering the full spectrum of GIS
and Remote Sensing needs from database
query, to spatial modelling, to image
enhancement and classification. Idrisi32 uses
the latest object-oriented development tools,
bringing true research power to the NT
workstation (NT) and desktop.
Sources: http://www.idrisi.com/
http://www.sbg.ac.at/geo/idrisi/wwwtutor/tuthome.htm