I don’t believe I’ve posted any significant lists of astronomy freeware software since 2006.
Last week I saw Microsoft released version 5.0 of their WorldWide Telescope project so it seemed a good time to post that and a few others.
- WorldWide Telescope 5.0 takes another small step in galactic space exploration - Next at Microsoft
- WorldWide Telescope - Microsoft
Then there is Celestia.
You can install nice add-on features via packages from The Celestia Motherlode including both real and fictional spacecraft.
And there is also a Celestia Portable version as well.
If you want even more software options, check out this gizmo’s freeware posts that outlines many more options: Best Free Astronomy Software