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Esri

GRASS GIS (Geographic Resources Analysis Support System) is an open source, free software (FOSS) Geographical Information System (GIS) with raster, topological vector, image processing, and visualization functionality

Caliper Corporation develops state-of-the-art GIS software: Maptitude Mapping Software, TransCAD Transportation Planning Software, and TransModeler Traffic Simulation Software

National Geographic Store: Shop for Magazines, Maps, Globes, Atlases, Books, DVDs, travel clothing, outdoor gear, science tools, fun and educational kids toys, and support the non-profit mission of the National Geographic Society with your purchase.

Juniper GIS is a leader in GIS training for ArcGIS software. We bring our computers to your location for onsite GIS training. ESRI-Authorized classes and Juniper GIS custom classes.

Hundreds of fun educational games and activities for kids to play online. Topics include math, geography, animals, and more.

The GeoCommunity provides FREE GIS data downloads, GIS job postings, news, GIS software tools, utilities, discussion, and fun in geographic information systems and location based applications.

Quantum GIS - Open Source Geographic Information System

Help build the most comprehensive human-reviewed directory of the web

Quorum Business Solutions provides an integrated portfolio of energy business management software solutions and consulting services for companies involved in oil and gas production gathering processing transportation distribution and marketing as