Free A page with links to a variety of map tools. These will be useful for students who are creating maps for display on a screen. They download immediately to your drive for your use. Several scales and varieties exist for each tool. Several types of digitized maps are avaailable for each of the 50 states.
Maps are free.
A nice service. Map Library from Perry Castenada at Univ. Huge list of maps and resources for environmental research. There are separate links to geodata information maps as well as satellite imagery maps. Map Resources from George Mason University Excellent resources from GMU includes Bosnian virtual field trip, cartography resources including a long list of map servers and GIS servers.