Stellarium - Stellarium is a free open source planetarium for your computer.
Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
KStars - KStars is a Desktop Planetarium for KDE.
Sky Guide - A window to the stars has never been more beautiful and easy to use.
Celestia - Real-time 3D visualization of space
SkyView - SkyView is powerful, easy-to-use app that answers questions about stars, constellations, and more.