Backbone.js is a mature, popular, and lightweight javascript library which aims to bring structure to your client-side code. The goal of backbone.js is to bring MVC, a software architecture pattern, to client side development.Actually, backbone.js is an MV framework where view is also responsible for controller logic as well. In this blog, we will build a simple social bookmarking application.
In brief, MVC is a programming design pattern for separating the different concerns of your application. The M corresponds to Model and is used to define domain object. The V corresponds to View and is responsible for display logic. Finally, the C corresponds to Controller and is responsible for user interactions and interactions between Views and Models.
You can find source code of the application here https://github.com/shekhargulati/getbookmarks. Backbone.js is used by Linkedin, Foursquare, Wunderkit, Groupon, etc to build complex applications. You can view the full list here.
Read full blog at https://www.openshift.com/blogs/building-single-page-web-applications-with-backbonejs-jaxrs-mongodb-and-openshift
Shekhar Gulati 
Thank you very much for the great article. this is very useful post. All the points you mentioned are relevant and put together in an interesting way