Bookgaze
Bookgaze allows users to find similar books that are similar to either an old favorite or a recent read. While there are several other sites that provide similar functionality, Bookgaze was designed to present the user with a very simple and sleek interface to quickly find and purchase books both at a computer and on an iPhone.
The system was built using jQuery and Backbone on the front-end, and utilizes a NodeJS service on the back-end that interacts with the Amazon's API amongst other services to retrieve recommendations.