Celestia

Celestia is an application for real-time 3D visualization of space, with a detailed model of the solar system, over 100,000 stars, more than 10,000 galaxies, and an extension mechanism for adding more objects.

Free Open Source Mac OS X Windows Linux

Pioneer

Pioneer is a space adventure game set in the Milky Way galaxy at the turn of the 31st century. The game is open-ended, and you are free to explore the millions of star systems in the game.

Free Open Source Mac OS X Windows Linux

Orbiter

Orbiter is a realistic 3D real-time space flight simulator program. Fed up with space games that insult your intelligence and violate every law of physics? Orbiter...

Free Windows

Pioneer Scout Plus

A game of missions, trade and space combat in the 31st century using the Pioneer Space Sim engine with many additions and improvements.

Free Open Source Windows Linux

Digital Universe Atlas

The Digital Universe Atlas incorporates data from dozens of organizations worldwide to create the most complete and accurate 3-D atlas of the Universe from the local...

Free Mac OS X Windows Linux

Mitaka

Mitaka is software for visualizing the known Universe with up-to-date observational data and theoretical models. Mitaka users can seamlessly navigate through space, from...

Free Windows