Heavens Above - Website for tracking Satellites, Space ships and other space objects.
Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
See A Satellite Tonight - Free web app to explore satellite locations.
Stellarium - Stellarium is a free open source planetarium for your computer.
Celestia - Real-time 3D visualization of space
Star Walk - Star Walk – Sky View: Explore the Stars.