Agencies looking to find low-cost, entry-level GIS applications might find this of interest.
Quantum GIS (QGIS) is an Open Source Geographic Information System that runs on Linux, Unix, Mac OSX, and Windows and is licensed under the GNU (GNU’s Not Unix) General Public License. It supports vector, raster, and database formats.
QGIS has the following features:
1) View and overlay vector and raster data in different formats and projections without conversion to an internal or common format.
2) Create maps and interactively explore spatial data with a friendly graphical user interface.
3) Create, edit, and export spatial data.
4) Perform spatial analysis using the fTools plugin for Shapefiles or the integrated GRASS plugin.
5) Publish your map on the internet using the export to Mapfile capability.
6) Adapt Quantum GIS to your special needs through the extensible plugin architecture.
The information for this post was taken from the Quantum GIS website.