I just came across this game today, actually. It's free-roaming, 3D space simulator from StarWraith 3D Games that looks like it's from a similar mold as X3. I haven't sunk more than maybe 15 minutes into the demo, which is basically the full game only timed, but it looks like it got some really cool stuff in it.
Here's what I've seen so far from:
-Graphics aren't too hot overall, but outer space locals look pretty good
-You can race other ships for money or mine asteroids or other odd jobs
-There's a ton of upgrades for your ship
-You can pass through the atmosphere to dock at cities for trading
-You can be a pirate or a mercenary or a spy and all kinds of other occupations
-Has multiplayer
-Don't know yet if massive fleets or owning businesses are in
-Full game is $25
Here's the demo:
http://files.filefront.com/Evochron+Legends+v1088/;13613233;/fileinfo.htmlI'll post some more detailed impressions later.