Mimosa is an ongoing experiment in writing a distributed, peer-to-peer network for private communication among selected individuals. Its current protocol is based on Kademlia.
The implementation of key-value lookup in the DHT is in its final stages. Once this is complete, the DHT will be used as a store allowing distributed messaging to take place.
Dipelta contains the main project; libds is a library for data structures; Morina contains old experiments and early networking code.