You could try Hellas (
http://www.hellasrpg.com) but it's got a setting that's fairly well tied into the system.
However...
Kagekiri:
I'm looking for something with a fun combat system (something with some good rules for cover) since there's probably going to be a good amount of combat. It will probably need stats for plasma guns, energy swords, and the like. Preferably something with a system for designing starships and droids. Preferably something with rules for FTL travel and "beam-me-down" technology. I mean, I could just say: "You have beam-me-down tech on your ship," but I'd prefer some more solid rules, the kind I used to come up with when I hard more time for this kind of thing. :)
Hellas has a fun combat system. Rules for cover are basically just modifiers to your to hit roll or evade roll; there's not a separate solid system for adjudicating that.
Stats for plasma/laser guns, projectile guns (from pistols to shotguns to sniper rifles), laser swords (or spears or axes) and even Personal shields. Robots are a collection of stats. You can do cyber-limbs, but the rules are weak there (as in an arm is just an arm, but you can explain it adding to STR or whatever just like any other item).
There are rules for building starships. Rules for building robots (just like monsters).
There is a FTL system - slipspace - that can drive you mad if you're sailing through it for too long. There's a system set up for tracking sailing times and how to shave off bits and increase your speed and what happens when you're using slipspace and all that.
No 'beam me up' tech, though.