I recently bought and have been playing-
Eorathril, which is an OSR-based low fantasy rpg. (First rpg in a long time that I liked so much that I ordered a print-on-demand copy.)
Mothership and White Star, for sci-fi.
Hideouts & Hoodlums, Gangbusters BX and Eldritch Tales are my most recent purchases.
I plan to combine them into a pulp hero game.