Wizards is a project mainly written in RUBY and COFFEESCRIPT, it's free.
Example Backbone.js on Rails app with Faye for pubsub sync
This is an example Backbone.js and Rails 3.1 application. The name is inspired by a game of Wisest Wizard at RailsCamp New England 2011.
The application is scaffolded using https://github.com/codebrew/backbone-rails
It uses the backbone_sync-rails gem to broadcast model updates to clients.
You'll need to run a Faye server. See Procfile for the command, or use Heroku's foreman gem: http://devcenter.heroku.com/articles/procfile