An application built to learn the basics of Backbone, integrate it with a basic rails server and to connect to an external service.
This is the culmination of about 6 hours of effort, which includes time relearning some nuances of JavaScript and the basics of Backbone. Since I was already coming up the learning curve on Backbone and because proficiency with JavaScript wasn't the main purpose of this exercise, I chose not to write JavaScript tests.
This app is hosted on heroku: http://address-mapper.herokuapp.com/