Now this is interesting, I know about Tor ofc, with all problems surrounding it (exit nodes etc) but I guess an onion website could be made well protected and shared & updated. You have to host it yourself though I guess.
Freenet, gotta dig down and see how it works under the surface, it looks very promising but it's kind of complex and I haven't yet figured out if it is all benevolent sharing for example and what happend if some random node sharing your stuff goes offline.
Very interesting!
I think (I'll dig more to see if it stands) my advantage would be the redundancy (so the data always stays up and is hard to take down), the no need of benevolent nodes, and potentially the ease if use.