Super Planet Crash

A game of gravity. Go crash some planets!

Celestia

Celestia - real-time 3D visualization of space.

Discover the universe with our downloadable atlas—the Digital Universe—where you can fly from the Sun out the edge of the observable universe.

Exoplanet Explorer takes you on a journey beyond the limits of our Solar System.

Stellarium Mobile is a fully-featured planetarium for your phone.

A browser-based virtual planetarium of stars and planets, customizable to any location and time.

SourceForge presents the Solar Model project. Solar Model is an open source application.

Space Engine is a realistic virtual Universe you can explore on your computer.

Stellarium is a free open source planetarium for your computer.

WinStars, an astronomy shareware.

The WorldWide Telescope (WWT) is a Web 2.