The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Talislanta is still in print. It's probably going to be _out_ of print soon, but it's been moving along quietly. You can pick up the 5th Ed books on Amazon, as well as buy the older edition pdfs here: http://www.rpgnow.com/index.php?filters=0_0_10123
Marvel FASERIP (had a blast rationalizing random powers)
Millennium's End (I just loved the overlay system)
DC Heroes (once you figured out the system you could build just about anything)
My favorite out-of-print games right now are probably TSR's Marvel Superheroes, Basic D&D, and White Wolf's Street Fighter. I don't actually miss them because we still play them regularly
The consensus on the internet seems to be that Street Fighter was broken, but I dunno. I actually think that's something of a myth. We played it weekly (sometimes twice a week) for 7 years straight (3 full-length, multi-year campaigns), and we had no real problems. Maybe because we stuck to the core book and Secrets of the Shadoloo? Anyway, I think the core rules for the game are a lot more robust than many people give them credit for.
Marvel super heroes adventure game which used the SAGA game rules. Also the Street fighter rpg by white wolf. I enjoyed that when I was new to the world of rpg's. But sadly I lost my copy of the book. Oh and the TNMT rpg.