It's like Freespace, but even MORE free then any other merchant game I have played. The game is small, but big in it's own way. The company is ONE guy who developed it and if you like this game it's actually very very good.
Check out and download the Demo which is basically the full game but with a time limit:
i'll definately check this out, always been a space-sim fan, ever since playing the original wing commander back when i was too young to even pass the first level