WebSockets for Ruby made easy Easy WebSockets + Powerful Publish / Subscribe Iodine (with or without Plezi) offers easy WebSockets and a powerful pub/sub solution for Ruby. Add iodine to your favorite Framework or use it directly for a Rack application: require "iodine" # this config.ru example runs on iodine. # A simple Websocket Callback Object. module BroadcastClient # subscribe to new clients.