I am looking for wysiwyg designer that creates applications in html 5 (based on any major JavaScript library like JQueryUI or other).
So far, the only thing I found is Ext Designer:
http://www.sencha.com/products/designer/
but it is still in very early stage and with serious limitations (custom components can not be added to toolbox for example).
Any alternatives?
There is Atlas a development tool for building Cappuccino applications. Cappuccino apps are written in objectiv-j and will be compiled so they run as Html/JavaScript Applications.