Warband is a free RPG with a science fantasy, science fiction flavor. In truth, it could very well be the Warhammer 40K RPG. The author writes:
This game is my homage to the ‘grim, dark future’. A game of spikey power armor wearing, bolt-gun shooting, chain-sword waving chaos worshippers. Characters struggle to survive in the warp of space, as low-level members of a Chaos Lord’s warband, they strive to make a name for themselves and eventually captain a ship of their own.
My perusal of blogs tells me that a lot of miniature gamers now are running rpg style miniatures games with rules sets like Conan!, Song of XXX and In Her Majesty’s name among others. For people running Conan style games, here’s a great list of treasures / objectives.
Lamentations of the Flame Princess is an old school RPG of “fantasy adventure and horror.” The link is to the free version without illustrations. The illustrated version apparently has some rather adult and disturbing illustrations.
BioSyndrome is a community created game of zombie survival horror.
Dark Coast is a new fantasy RPG with some unique mechanisms.