There is also https://github.com/n0-computer/iroh-willow which is under construction and based on the #Willow protocol. This is also a foundational #p2p technology, which received funding by @nlnet under the EU Horizons #NGI0 programs, to evolve their specifications.
Willow contains among others a specification for support of object capabilities, called Meadowcap, which is very interesting.
https://willowprotocol.org/specs/meadowcap/index.html#meadowcap