ClearMaps: GIS Directory Listing including lists of GIS software vendors, GIS organizations, GPS, remote sensing, free GIS data, and so on.
Colorado's Portal: Categories for employment, internships/volunteering, data, events, education.
GIS Landbase Information and Data Links: Lists national, regional, state and local sources for landbase related information and data.
GIS Portal: A GIS resource with about 650 links.
LLEK Bookmarks Scientific Search Engines: Lists German and English GIS resources.
MapDawg's GIS: Links to maps, spatial data, and other items related to geography.
Spatial Hydrology: Gateway to the world of hydrologic modeling, GIS, GPS and remote sensing.
The GIS Notebook: A complete list of GIS web sites.
The World of Maps: Links to catalogues of map collections and archives.
Useful Resources for MapInfo Users: Directory of GIS-related links.
Web-Mapper Online Mapping Resource: Portal containing GIS and mapping news and links.