The Temple of the Bear - Adventure from Sharp Mountain Games, so presumably somewhat short and for mid level, but with tokens and maps and all that. $2.50, 30 pages (half of which is probably pre-generated characters)
Old School Essentials Classic Fantasy: Cleric & Magic-User Spells - Plain Text - Free
Old School Essentials Classic Fantasy: Genre Rules - Plain Text - Free
Nalfeshness-Kin Racial Class - That would be the ape demons. $1 and 5 pages
RPPP: Pocket Planes - Not the flying kind, nor medieval authentic, but rules for randomly coming up with smaller demi-planes. $1.99 and 11 pages.
The Nocturnal Table - Random city encounters from Gabor Lux. $6.50 and 60 pages.
Dungeons in Blue: Just Geomorphs #13 - Sounds like an adult video series, but just maps, suitable for use with a virtual tabletop. $3.49
Friday Enhanced Map 10-18-19 - sort of looks futuristic. $2