I'm surprised I forgot these two.
Star Frontiers is alive and well at Starfrontiers.org. Then we have Starfrontiersman being added to the Resources list.
I also forgot Talislanta. No friggin elves!
Edit: I also forgot ZEFRS - the engine behind the old Marvel Superheroes Game, Conan and Gamma World 3rd Ed, all by TSR.
OSR Session Report III - Midnight at Tanière de Loup, an OSR WWII Mini-Adventure Using Operation White Box & Bloat Games's SURVIVE THIS!! Vigilante City - Core Rules - 'So it's been a long while since we got together for our super game event using Operation White Box & Bloat Games's SURVIVE THIS!! Vigilante City - Core ...
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