This looks interesting

Currently in EA,and judging by early reviews has great potential although a little buggy at present. I've not purchased it yet,I thought the price tag was a little high.

You need to maintain your ships,you can build space stations by docking modules you find.Has full Newtonian physics and orbital mechanics.

And one from Obsidian Ant (if anyone follows his E:D stuff)

“Dictators ride to and fro on tigers from which they dare not dismount. And the tigers are getting hungry.”