» FreeGIS.org 
- Links to free software and data.
» Centre for Advanced Spatial Analysis: GIS Timeline Team - A timeline reference outlining the history of GIS.
» EPA Region - Environmental Protection Agency resource for GIS system data and applications in New York, New Jersey, Puerto Rico and the U.S. Virgin Islands.
» European Geo-Portal - Infrastructure for Spatial Information in Europe is an initiative launched by the European Commission.
» Example Code - Forum features information and resources related to GIS.
» The Food and Agriculture Organization - The FAO GeoNetwork provides Internet access to interactive maps, satellite imagery and related spatial databases.
» GeoCommunity - Data downloads, news, software tools and utilities.
» Geography Network - An Internet portal to spatial data.
» GIS Cafe - A resource for GIS professionals.
» GIS Case Studies - Examples of United States and Canada raster and vector GIS projects.
» GIS Lounge - The complete source for information and resources. Information on data and applications and about GIS careers.
» GIS Monitor - GIS monitor goes beyond the headlines and press releases. Local, county, state and federal Mapping and GIS users, consultants read and depend on the GIS Monitor Newsletter every week.
» GIS Skills Page - Page contains Ryan Galbraith's academic and work experience.
» GIS.com - Provides introductory overviews on many aspects of GIS. Find information about industries, curriculums and current events in GIS.
» GISuser - Site delivers the latest news, feature articles, and updates concerning the use of GIS, LBS, GPS, and geospatial technologies.
» GISZone - The site contains information resources about the emerging technologies like Geographic Information Science, Remote Sensing, Global Positioning System, and related technologies.
» Intergraph Mapping and Geospatial Solutions Home Page - The leading mapping, GIS, and geospatial solutions provider for: geospatial resource management, land information management, geospatatial data management and cartography, geospatial intelligence, commercial remote sensing and photogrammetry.
» Public Health - Provides information on the use of GIS in public health applications, from a 1998 conference.
» ReGeo Geo-Information System - Project aimed at creating an information system based on a virtual geo-multimedia database, which will serve different applications including rural communities and eco-tourism.
» SpatialNews - News, features, career postings, events, and daily wire.
» Steigerwald, Scott - Exploration of geography, GIS, geographic programming and serving maps on the web. Resource for ArcIMS and ESRI-based software.
» U.S. Geological Survey - Gives a brief overview of how a GIS is used, some of the theory behind how it operates, as well as a discussion of various applications.
» Wen Tzai-Hung's Geospatial Research - Describes study results on the use of geographic information system models that could be used to help people with water usage control and epidemic health risk predictions. Includes map illustrations.
