Sencha Ext JS is a comprehensive JavaScript application framework for building feature-rich, cross-browser-compatible web and mobile applications. It includes a library with 140+ high-performance customizable components, a set of tools and a powerful UI Framework.
Key Features
Rich UI Components – Includes a variety of pre-built UI elements such as grids and trees, menus and toolbars, forms and buttons, etc.
Cross-platform compatibility - Supports major desktop and mobile web browsers including IE Firefox Chrome Safari and Opera.
Data Packages – Includes data components to interact with various data sources including JSON, XML and database connections.
Theming and Skinning - Allow easy skinning and theming of the UI with CSS.
Development Tools - Includes an extensive set of development tools including a visual designer and debugger.
Large Community - Has an active and large community of developers who provide support, extensions, etc.