GIS.com
Provides introductory overviews on many aspects of GIS. Find information about industries, curriculums and current events in GIS.
http://www.gis.com/

FreeGIS.org
Links to free software and data.
http://freegis.org

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.
http://www.gismonitor.com/

Centre for Advanced Spatial Analysis: GIS Timeline Team
A timeline reference outlining the history of GIS.
http://www.casa.ucl.ac.uk/gistimeline/

GIS Case Studies
Examples of United States and Canada raster and vector GIS projects.
http://members.tripod.com/krismaps/algonquin/index.html

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.
http://erg.usgs.gov/isb/pubs/gis_poster/

GIS Skills Page
Page contains Ryan Galbraith's academic and work experience.
http://www.geocities.com/galbraithr/

GISZone
The site contains information resources about the emerging technologies like Geographic Information Science, Remote Sensing, Global Positioning System, and related technologies.
http://www34.brinkster.com/knshaikh

The Food and Agriculture Organization
The FAO GeoNetwork provides Internet access to interactive maps, satellite imagery and related spatial databases.
http://www.fao.org/geonetwork

GISuser
Site delivers the latest news, feature articles, and updates concerning the use of GIS, LBS, GPS, and geospatial technologies.
http://www.gisuser.com

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.
http://www.epa.gov/region02/gis/

Example Code
Forum features information and resources related to GIS.
http://www.jrbtech.com/

GeoCommunity
Data downloads, news, software tools and utilities.
http://www.geocomm.com/

GIS Cafe
A resource for GIS professionals.
http://www.giscafe.com/

GIS Lounge
The complete source for information and resources. Information on data and applications and about GIS careers.
http://gislounge.com/

Public Health
Provides information on the use of GIS in public health applications, from a 1998 conference.
http://www.atsdr.cdc.gov/gis

Steigerwald, Scott
Exploration of geography, GIS, geographic programming and serving maps on the web. Resource for ArcIMS and ESRI-based software.
http://www.scottsteigerwald.com

Geography Network
An Internet portal to spatial data.
http://www.geographynetwork.com/

European Geo-Portal
Infrastructure for Spatial Information in Europe is an initiative launched by the European Commission.
http://eu-geoportal.jrc.it/

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.
http://www.felis.uni-freiburg.de/regeo/

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.
http://idv.sinica.edu.tw/wenthung/