Live Grid
http://www.ext-livegrid.com/

ExtJS WordPress
http://extjswordpress.net/

Web based Desktop
http://www.qwikioffice.com/

My SQL Manager – AeroSQL
http://www.burlaca.com/aerosql/

Remote Component
http://demo.matikom.de/ext/remotecomponent/Ext.ux.Plugin.RemoteComponent.html

FRAMEWORKS:

RIA  Framework on .net

http://liveui.net/

ASP.net based ExtJS Controls

http://coolite.com