Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
EarthView - Free Cloud Data Download
Stellarium - Stellarium is a free open source planetarium for your computer.
Desktop Earth - You should run it as admin.
Star Walk - Star Walk – Sky View: Explore the Stars.
Xplanet - Xplanet is free software, distributed according to the terms of the GNU General Public License.