[knsprgswrstchn]

Universe Sandbox has an awesome UI!

I think it is custom built tho, but I would love to see how they did it

[naikrovek]

There is a podcast by Zach Barth (of Zachtronics) where Universe Sandbox is discussed at length. If I recall, its an entire episode.

Edit: yes, episode 4. http://www.zachtronics.com/podcast/