Space/Star ship games?

Does anyone have any suggestions of games where you are in control of ships, either star trek or star trek styled ships, something similar to the old game Starflight, but preferably (but not essentially) more modern? I'm meaning games for the PC, either free games or ones I'd have to buy, not fussy. I've got Star Trek Encounters and Conquest for the PS2 and like both of those, so ideas for anything similar to that would also be appreciated.