Marionette-demo is a project mainly written in JAVASCRIPT and RUBY, it's free.
This is a demo of a 'todo' application using Marionette. It's based on Sinatra, so after bundling your gems:
bundle install
You should be able to get away with starting the server by:
ruby todo.rb
Once the server's started, to view the static site visit:
http://localhost:4567
To view the Marionette powered site, visit:
http://localhost:4567/index.html
and hit "Begin!" (yes, I'm working on autoloading...)