In case you missed it, the "off-the-grid" app Manyverse now has a Fediverse account for announcements and questions:
Manyverse works on Scuttlebutt, a distributed social network without any servers, where people connect directly to each other:
Scuttlebutt lets you have complete control over your data (it's stored on your computer or phone) and over who sees it (only people you connect with).