Jan 23, 2024
Holmes 77, one of many D&D retroclones compiled at:
Here is an overview over all the retroclones and OSR systems based on the various editions of D&D as well as other RPGs that are based in D&
Some PDFs are hosted at that site, and others are linked, with some older links now broken.
Another list of retroclones, OSR games, and OSR-like rules is hosted at the ynasmidgard blog, with a link to a googledoc in the first sentence of this post:
I present to you a comprehensive list of OSR/D&D-esque games. Only those games qualified that are either (1) retroclones (presenting an ol