In another thread about this, someone mentioned Lemmy, a federated alternative to Reddit:
https://lemmy.one/communities/listing_type/All/page/1
Looks like an interesting approach.
For people favouring to the old reddit interface more, I created another federated alternative: https://github.com/mariusor/go-littr (with an example instance at https://brutalinks.tech).
Sadly it received less publicity and mind share than lemmy, so not everything might be up to the expectations of the HN crowd.