Nostr ones are here:
nostr:npub1cn670f663n3ks02jnnlsvd5y88zjnefy8343ykaxs7y3nzzketrsrjwt8a HMW send to btcmap communities?
Discussion
We've got 500+ here:
https://btcmap.org/communities
They need Nostrifying, but there are many competing community specs right now.
The specs being used here are NIP-23 for the blogs and about pages, NIP-52 for events and NIP-72 for the social groups tab.