Ratman is a decentralised, peer-to-peer packet router (following the gossip
protocol approach), written in Rust.  With Ratman you can create private
overlay networks (similar to VPNs), connect to a wider community mesh of
existing overlay networks, plug into specific wireless drivers for fully
off-the-grid routing, or do all of them at the same time.

Homepage:
https://irde.st/
