Quantum GIS

Quantum GIS (QGIS) is a user friendly, open source, cross-platform, and freely distributed GIS application. With QGIS, one can easily import multiple raster, vector, and GPS-like coordinate data for the purposes of geospatial data visualization, manipulation, and map production. For users seeking more advanced functionality, QGIS can also serve as a nice graphical interface to GRASS. For more information, read the release announcement of version 1.7.

Resource portals

Online tutorials and demos

More on QGIS

Plugins