Looked into #GNUNet a little bit today. I like their "throw it all away and rewrite it" approach to the problem of centralization on the internet. Sometimes it's just what you have to do.
https://www.gnunet.org/en/index.html
I didn't know anything about it until @raphadue pointed it out to me. (https://social.tchncs.de/@raphadue@fosstodon.org/109972789844993170)
My search has shown that while not well known, it is a well regarded project. It's been around over twenty years but it still has momentum.
Intro vid: https://youtu.be/qZYI-3Q1INI