pokan is an implementation of the Gossip protocol (best described in http://www.cs.cornell.edu/home/rvr/papers/flowgossip.pdf), which aims to have a simple, event based API capable of being used in large, not previously known networks.
pokan-cluster adds a handy set of functionalities on top of pokan, everyone's favorite Ruby Gossip protocol implementation. Logging, easy YAML configuration file, workload information of peers in your network (so that you can write a simple load balancer) are among the features pokan-cluster has to offer! Take a look at it and contribute! (see our Github page).