Juggernaut_jquery is a project mainly written in JAVASCRIPT and RUBY, it's free.
gem install maccman-juggernaut -s http://gems.github.com
rails juggernaut_test cd juggernaut_test
juggernaut -g config/juggernaut.yml
script/plugin install git://github.com/maccman/juggernaut_plugin.git
script/generate controller chat