Collecting
David Rumsey's Map Collection, International Antiquarian Mapsellers Association (, International Map Collectors Society, Road Map Collectors of America
Directories
About.com: Maps, Alexandria Digital Library, All the World's Maps, Bodleian Library Map Room, Links 4 Maps, Maps from start4all, Maps on Other Web Sites, Oddens' Bookmarks, StreetLookup.Com
Historical
Abandoned Mines of Colorado Springs & El Paso , Antiquarian Maps at the Reed College Library, Antique Maps of the Pacific Ocean, Athena Review Image Archive: New World Maps and Si, Athena Review Image Archive: Old World Maps and Si, Atlas Coelestis, Batavia Virtual Museum, Bodleian Library - The Map Case, Boundaries of the Contiguous United States, Canada at Scale: Maps of our History
Libraries
Adelaide University Library - Atlases and Gazettee, Appalachian State University - Map Library, Arizona State University Libraries - Map Collectio, Association of Canadian Map Libraries and Archives, Ball State University Libraries - Geospatial Cente, Bates College - Ladd Library - Maps, Boise State University - Albertsons Library - Maps, Bowling Green State University Libraries - Maps C, British Library Map Collections, Brock University - Map Library
Atlapedia Online
Contains full color physical and political maps as well as key facts and statistics on countries of the world.
Atlas of the Biosphere
A collection of maps, schematics, and information about human-environment interactions, directed at the education community.
CIA World Factbook - Reference Maps
Various maps of the world in both jpeg and pdf format that are updated annually.
Cornell's Digital Earth
Use this interactive atlas to create maps displaying land, oceans, borders, roads, lakes, rivers, roads, railroads, faults, mines, seismic, and other geological, geographical, and geophysical data.
Google Maps
Provides directions, interactive maps, and satellite/aerial imagery of the United States. Can also search by keyword such as type of business.
Great Circle Mapper
Shows great circle path between specified points on the globe with an aviation focus.
MapQuest
Find directions for and explore towns and cities worldwide. Display addresses on a map, view nearby businesses, get driving directions and maps, and plan a trip with city information. Also includes aerial photographs of selected areas.
Maps of World
Online maps showing countries of the world and continents. Too wide for smaller monitors.
Multimap
Global mapping service including street maps of Europe, North America and Australia.
Readmap Project
Online maps collection with political and economical overview of each country.
TerraServer
View maps and aerial photos of various parts of the Earth.
United Nations: Cartographic Section
General country and special issues maps.