This website lists the social media services that various Reddit communities are moving to as part of the protest against Reddit's API changes.

I'm seeing some chat forums I've never heard of including: Lemmys World, Fedi, Radi and Squabbles.

There is some real demand for Reddit alternatives at the moment.

I've seen several posted invitations for people in the No Man's Sky communities to use Lemmys World.

I'm of course, holding out for Just About to be ready so I can propose it as an alternative