With the recent protest and blackouts, I've been trying to keep up with the communities I follow outside of Reddit. It's been a bit difficult to find where people went to. Some subreddits linked to Discord or Lemmy servers, but even then, when they are privated, the links are inaccessible.
I’ve heard the same complaint from other people - subreddits are down, and people support the blackout, but finding alternatives is confusing, mostly because there are multiple platforms people jump over to.
So, I created https://sub.rehab to attempt to list where subreddits have moved to. It is open source, and edits can be suggested by anyone. It's obviously lacking content - these are just the subs I found on different platforms.
I think this could be useful, especially for subreddits planning an indefinite blackout - it would make it easier to discover alternatives.