I’m working on a post highlighting positive things happening in the fediverses. Of course there’s also a lot of stuff that isn’t so positive, which (not unreasonably) draws a lot of the attention … but Mastodon in particular can be a very negative place (in fact a Mastodon user responded to the original post saying “are you kidding me? I have never used a non free, as in freedom social, where the **** do you find negativity in this place? Really, you are probably on the wrong server, join us.” 
.) So it’s useful to notice that hey, it’s not all bad.
Here’s my initial list, including DAIR’s Peertube page, The Website League, GoToSocial 0.17, Bonfire’s work on Open Science Network and prosocial design patterns, Bandwagon, Letterbook, Weird, and a bunch of stuff happening in the ATmosphere.
Of course there’s a lot more going on, what’s on your list?