Gurlic looks interesting:
Gurlic is an experiment in building a new/old kind of internet community. It is primarily a place for discovering and sharing technology, science, culture and the arts.
That’s from the about page, which continues with principles that make for an important and inspiring read. The one about domains stands out:
Every resource (user, community, publication etc.) must be mappable to custom user-owned domain names.
Basically: even though this is a shared platform, you can bring your own domain and truly own it.