Desktop Earth - You should run it as admin.
EarthView - Free Cloud Data Download
TerraTime - TerraTime provides an amazing, interactive, real-time virtual Earth.
Living Earth - Living Earth gives you a stunning live 3D simulation of our planet at our current moment in time...
Earth 3D Live Wallpaper - Earth 3D Live Wallpaper helps you capture the beauty of mother earth.
Earth 3D - This interactive 3D globe features wonders of the world, political and geographic maps, and weather.