AJAX GUI toolkit

Just saw this AJAX GUI toolkit.

Wow.

It a GUI toolkit for Javascript/ECMA-script widgets (i.e. buttons, trees, folders etc) - but it supports drag-n-drop and all sorts of goodies. That's pretty impressive - but then they developed an IDE using this toolkit. Let me just say that again, an IDE written in Javascript for authoring applications in their framework.

All of this runs in a browser and they've implemented their own SOAP stack in Javascript so that they can have integrated debugging of web-service calls within the IDE!