Open NASA - NASA data, tools, and resources
Sky Map - Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
Stellarium - Stellarium is a free open source planetarium for your computer.
Star Walk - Star Walk – Sky View: Explore the Stars.
Code NASA - 253 NASA open source software projects
Sky Guide - A window to the stars has never been more beautiful and easy to use.