There are other pending ones in the issues that I haven't worked on. But, other than those, yes, PRs are welcome!
I've forgotten about The Appleseed Project and One Social Web! Since the list is about federated SNS (and not specifically the fediverse/ActivityPub), I'm also considering adding BlueSky/ATproto (especially now there are bridges like Bridgy).
In any case, it's an attempt to find the links and relevant information, and then archive them, so it's easy to find them if someone needs it. ^_^