TerraServerSave
Online subscription service providing access to a database of high resolution satellite and overhead imagery from all over the world. http://terraserver.com/
Terrain Mapping SoftwareSave
Digital mapping software OrthoMapper and SurfaceMapper to create DTM's and digital orthophotos used in the surveying and mapping, photogrammetric, remote sensing and GIS communities http://www.surfacemapper.com/