DOKK is a free, community-curated data repository.
Mailing list: https://clif.peers.community/dokk/dokk.mlist
Data repository: https://clif.peers.community/dokk/data.git
Website: https://dokk.org
Other resources:
IRC: #peers at irc.libera.chat
Q&A: https://wotas.net
Peers: https://peers.community