Somewhat notably, the very old games, The Lords of Midnight and Doomdark's Revenge are now free on Good Old Games. They are part RPG, part strategy and are actually the modern remakes, which are basically still the old games but with high res (but still low color) graphics
Adventures & Settings
Luxania: Kent's Crossing - Town for the Odysseys & Overlords setting. 8 pages, $1.50
Mystery of the Mantle's Pockets - A Russian OSR product, with English version as well. Seems to be a gonzo-ish adventure set inside the pockets of a magic cloak. 18 pages, PWYW
SG1 Rite of the Hero - Low level adventure from Starry Knight who now seems to be dual statting them for 1e and 5e. $4.99 and 20 pages.
Ultraviolet Grasslands and the Black City - Seems to be one of those artistic setting/adventure things for auteurs . $25 and 198 pages
Class Compendium Volume One - This is for the Low Fantasy RPG which is sorta OSR. PWYW, 27 pages
Gothic Horror Monster as Class - Vampire, Mummy, Werewolf, and "Renanimated", which I take to be Frankenstein's Monster, Adam. 12 pages, PWYW
Kaigaku Second Edition - This is interesting, it seems to be an Asian fantasy (Japanese) themed game using the Stars Without Number rules (presumably minus the technology). $10 and no page listed, but it's hefty at over 100 megabytes.
Oldskull Game Expansions Book II - 1977 Bestiary - Basically this seems to be the 1e Monster Manual re-written for Old School Essentials. $3.99 and 164 pages
Alarms & Journeys #3 - This seems to be less of a fanzine and more a proper magazine on various old school games, including a bit on Top Secret. Priced more than one, though, at $10.99 and 82 pages.
Friday Enhanced Map 1-31-20 - Looks like an underground temple or possibly a shopping mall. $2