What are some alternatives?
When comparing SkyORB and Sky Map of Constellations, you can also consider the following products
Stellarium - Stellarium is a free open source planetarium for your computer.
NASA App - Showcases a huge collection of the latest NASA content
KStars - KStars is a Desktop Planetarium for KDE.
Star Chart - Stellarium is a planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free. Read more about Star Chart.
Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
Google Sky Map - Google Sky Map is a free hand-held planetarium that allows you to identify stars, planets and more.