AngularJS is a powerful and extensible HTML and Javascript based framework for building web applications. It is based around the paradigm of Model View Control (MVC), allowing modular development of your applications in javascript via controllers, and has data-binding client-side via HTML, with live data at runtime. This is a far more powerful and adaptable pattern for a web app than the traditional server-side PHP/ASP bindings called only once on the page-load. AngularJS is the ideal framework to adopt for building web applications, and HTML5 based mobile apps.