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NASA World Wind - http://worldwind.arc.nasa.gov/
Uses Landsat satellite imagery. |
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TerraServer - http://terraserver-usa.com/
Most of the U.S. (courtesy the U.S. Geological Survey) plus portions of other countries. |
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GlobeXplorer - http://www.globexplorer.com
Includes aerial and satellite photographs, some high resolution. |
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TerraFly - http://www.terrafly.com/
Provides United States Geological Survey photographs overlaid by street names, searchable by street address. |
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Acme Mapper - http://mapper.acme.com/
Front-end service which applies TerraServer photography to a set of variables. |