N-O-D-E
https://n-o-d-e.net/
Decentralization and P2P technologies, open source, do it yourself tutorials and hardware design, cutting edge technology and more.
META MESH
https://www.metamesh.org/
PittMesh serves as an example of how to build a mesh network in a specific geographic area that has websites and services built on top of the network. PittMesh is a standalone wireless network that exists parallel to the Internet and will remain up should Internet access go down.
POSTMARKET OS
https://postmarketos.org/
A sustainable, privacy and security focused free software mobile OS that is modeled after traditional Linux distributions.