Today I installed the #Manyverse app from #FDroid - it is a social network based on #SecureScuttleButt or rather a mobile frontend for the Secure Scuttlebutt protocol. Many concepts are difficult to grasp, as it's very different from the Fediverse - you don't need a server in the first place. It seems rudimentary but very promising since it can work off the grid, via Bluetooth or local network. There are no URLs for users neither for messages. Reminds of #Briar in many ways.