Lemmy is a free open source federated alternative to Reddit. You can follow their official account at:
You can try the flagship instance at https://lemmy.ml
They have now introduced federation between Lemmy instances, so people on one Lemmy instance can interact with people on others. (They are working on federating with the rest of the Fediverse later.)
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!