Ext JS helps you build data-intensive, cross-platform web apps for desktops, tablets, and smartphones. Take advantage of powerful features in Ext JS Premium including Pivot Grid, D3 Adapter, Calendar, and Exporter. On top of that Sencha EXT JS pro is very good for GIS Developers want create WebGIS, based on opensource program such as GeoServer with High quality , therefore who can create
medicine for Sencha ExtJS last version? smile.gif

https://www.sencha.com/products/extjs/#overview