
Ext JS is a cross-browser JavaScript library for building rich internet applications.
When creating a cross browser RIA, choosing a framework with a plethora of components is where most of us look first. Selecting a framework that enables you the flexibility to enhance and expand its offering becomes very important. Fortunately, Ext JS has all the rich UI functionality that most applications require coupled with a vibrant community creating impressive extensions. Ext's elegant design allows us to explore our creativity by adding new features to existing widgets.

Ext GWT is a Java library for building rich internet applications with GWT.
Ext products are used by companies all over the world across many industries. Listed below are just a few of those companies: