Monstrous Menagerie II: Hordes & Heroes has a launch date! Mark your calendars for November 12th, 2024. 300+ more monsters for your D&D 2024, or Level Up: Advanced 5th Edition games, plus new horde rules and rules for heroic monsters who level up alongside you--whether they be allies, companions, or foes! Click here to follow on Kickstarter!
As in, a module-by-module list of items placed as findable treasure?
Or a compiled list of every magic item that ever appeared in any module?
Like you, I vaguely remember the former; check in the archived-threads section for threads started by poster @Quasqueton and you might hit pay dirt. The latter, I've never seen anywhere.
It started with a curious notion, and it built up from going through one adventure module noting certain things mentally. Then it became actually taking notes on a piece of paper, and comparing between them. Following this opening post, will be lists of the treasure (gp value, xp value, and...