From what I can tell, Lemmy seems to be this:

https://github.com/LemmyNet/lemmy

Littr seems to be federated too:

https://littr.me/

That's about it for federated Reddit alternatives, at least that I can find. And I don't think the federated aspect has caught on yet for either.

Just a quick note that from what I understand, Lemmy is not yet federated but they are actively pushing to implement the ActivityPub protocol.

Most of the sites that attempt to be an alternative to reddit are filled with groups that reddit banned.

That's the problem I run into too.

Wait, you're looking for a federated alternative to Reddit, but people exercising free speech on other platforms is a problem for you?

Why not just stay with Reddit?

Just because I think it was wrong to ban jailbait doesn't mean I want to browse it.

A federated service would be harder to monetize. Which makes me think it would stay usable longer.

It took me some time to have my RSS feed setup the way I want it, but it is such a fresh breath of air. A thing I noticed is that my opinion about a certain subject gets influenced a lot by the top comments, whether here or on Reddit. I sometimes even read the comments before reading the article. Having to read an article and giving myself enough time to form my own opinion without directly checking what the comments "want" me to believe was refreshing. But still, having comments is important to see something from a different angle, which is why I still browse HN and reddit.

Usenet was the original "reddit."

Forgive the ignorance, but how do I access Usenet? I tried to look it up and I don't feel any closer.

This is part of the problem. It is not easy for new users to access...

First, you need access to a news server. These folks offer a free public one: https://www.aioe.org/ There are also other paid news servers but I don't want to advertise for them.

You also need an NNTP (Usenet) client. I use "slrn" which is a command line app. See https://en.wikipedia.org/wiki/List_of_Usenet_newsreaders for some others.

Once you find one, you'll need to point it to the news server of your choice (nntp.aioe.org in this example.)

Good luck discovering Usenet! Most groups are not too active.

Usenet. Its still alive, though some groups are more active than others; some groups are abondoned many years ago.

dev.lemmy.ml

Also it's not federated, but I like hubski.com