GrassPro 6.0.1 - Popular Pick

GrassPro is based on the free, open-source product "GRASS 6.0.1 GIS." It offers offers a host of ready-to-use GIS software and utilities, including: MapServer for publishing dynamic, navigable maps with layers over the Internet; PostGIS which enables spatial, geographic support for the included PostgreSQL (similar to ESRI(R)'s Spatial Data Engine (SDE) and Oracle's Spatial Extension); "OpenOSX GMT" a stand-alone application which features Generic Mapping Tools (GMT) 4.4.2 with iGMT 1.2 for a user interface, complete with an embedded world-wide data set with several layers including: elevation, sea-floor age, gravity and more; a suite of BLM command-line utilities and more all backed with documentation, tutorials, sample-data, limited installation and getting-started support.