GRASS (Geographic Resources Analysis Support System -- http://grass.itc.it).
Commonly referred to as GRASS, this is a Geographic Information System (GIS)
used for geospatial data management and analysis, image processing,
graphics/maps production, spatial modeling, and visualization. GRASS is
currently used in academic and commercial settings around the world, as well
as by many governmental agencies and environmental consulting companies.
Please have a look at the release notes:
or download it and have a try:
support (mailing list):
with best regards, the GRASS Development Team"