Ext JS : Ext JS is a JavaScript platform for rapid development of cross-browser web apps.
Ext JS

Overview
Ext JS is a JavaScript platform for rapid development of cross-browser web apps. Ext JS helps you build sustainable applications faster than ever. Develop amazing web apps built on web standards.

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Features

  • High performance, customizable UI widgets
  • Well designed and extensible Component model
  • An intuitive, easy to use API
  • Commercial and Open Source licenses available