NASA World Wind is a graphically rich 3D virtual globe for use on desktop computers running Windows. It combines NASA imagery generated from satellites that have produced Blue Marble, Landsat 7, SRTM, MODIS and more.
Punt is a Open Source multi-language desktop application that allows the user to view the terrain of any world in 3D. Using open standards Punt can make use of data from the Internet combined with local data in common GIS-compatible formats.
World Wind Plugins and Add-ons
A componentised globe component based on NASA's worldwind.