I just uploaded a pdf with rules for sci-fi gaming in BRP, that I have been using for a while. They are mainly for star wars-like space opera, but I believe they can be used in other settings as well. They have grown out of a frustration that there have been no actual starship rules for BRP (or not much for science fiction at all - though River of Heaven seems to change that).
I appreciate all comments: overall concepts, game balance, language - anything at all.
Download link: http://basicroleplay...p-starships-20/
or try: http://ge.tt/9acymz12?c