Although I'm supremely happy GMing our group's amazingly great Irrin Campaign (thanks to the players, not the GM, I'm sure), I am looking to do a Big Ole' Space Opera game next time out. I want the players to be responsible for the running of a dilapidated, run-down independent space station, borrowing elements from Traveller, Babylon 5, a bit of Firefly, and perhaps a tinge of original Star Wars and Star Trek: DS9. This game might not happen for a while, but I like to plan.
To that end, I was browsing through Your Games Now last night/this morning, and found several free space/sci-fi products of note. The first was Ronin Arts' Future Starship 14: Picket Ship (d20 statted), which is a nice, clean pdf product. I'll definitely be looking at getting more of the series, if my current $0 gaming budget sees an increase soon.
Other freebies I found:
-101 Starship Cargos
-101 Starship Names
-Future: 6 Free Sensor Contacts
I have to say, Your Games Now is growing nicely as a website. They don't yet have the volume of RPGNow, but they have some really great publishers on board, run some good sales, and keep adding features. Nice work.