Free GIS Software

Refer to There are lots of free gis software listed in the website:

http://www.freegis.org/

http://www.freegis.org/database/viewobj?obj=1116   FreeGIS-summary on Quantum GIS 

Name: Quantum GIS (QGIS): cross platform free software
Homepage: http://qgis.org/

How to install?

http://www2.qgis.org/en/site/forusers/alldownloads.html