sci-geosciences
Quantum GIS (QGIS) is a user friendly Open Source Geographic
Information System (GIS). QGIS supports vector, raster, and database
formats. QGIS lets you browse and create map data on your
computer. It supports many common spatial data formats (e.g. ESRI
ShapeFile, geotiff). QGIS supports plugins to do things like display
tracks from your GPS.