Backbone.js: The framework provides models that can be used by developers to give structure to the internet applications. The models come with custom and key-value binding events. The API provide by Backbone.js can also be connected with your existing API over RESTful JSON interface. At the same time, the API also supports several views, functions and event handling features.
AngularJS: The framework is designed to overcome the limitation of HTML. As HTML cannot be used for developing dynamic web applications, developers use AngularJS to extend the HTML vocabulary to complement the needs of their project. AngularJS further provides a set of tools required to create customized framework for the application development. The framework can be further integrated with other libraries to save the developers’ time and effort.