= Free Software packages using GEOS =

 * [http://www.postgis.org PostGIS]
 * [http://mapserver.org/ MapServer]
 * [http://www.qgis.org/ Quantum GIS]
 * [http://www.gdal.org/ogr/index.html OGR]
 * [http://grass.itc.it/ GRASS]
 * [http://trac.gispython.org/lab/wiki/Shapely Shapely]
 * [http://www.ingres.com/ INGRES]
 * [http://www.gaia-gis.it/spatialite/ SpatialLite]

= Proprietary packages using GEOS =

 * [http://www.safe.com/ FME]