Open-source water cooler locations

Hi HN, It seems like every open source community is managed in a different location or channel (e.g. slack, discord & subreddit). Are you able to share where you visit & which community it relates to?

I’d be happy to collate that list into a document for everyone: https://docs.google.com/spreadsheets/d/14bNirWxNAU83VOSYedcXf_uuHD9D8TvUJJn2iLsOnyg/edit?usp=sharing

This is a great way for open source maintainers to find places to promote their projects & packages.

Sorry in advance if this is a duplicate request, please also let me know if such a list already exists.