[boucher]

Well, GWT still deals heavily with HTML, CSS, and the DOM. It does offer certain abstractions that many frameworks do not. Both projects are certainly targeting a similar (but not completely identical) market.

I'm not quite sure what you mean by "the real contender" though.

[ludwigvan]

Sorry, English is not my native language. I was referring to the stackoverflow answer where it said gwt is a toolkit, cappucino is a framework. Sproutcore is a framework, so it seems someone would choose between cappucino or sproutcore if what they were looking for is a framework.

[asnyder]

There are many similar frameworks to choose from. Such as: (in no particular order)

GWT (http://code.google.com/webtoolkit/)

SmartClient (http://www.smartclient.com)

NOLOH (http://www.noloh.com)

DHTMLX (http://www.dhtmlx.com)

QooXdoo (http://qooxdoo.org/)

Vaadin (http://www.vaadin.com)

Echo (http://echo.nextapp.com/site/echo2)

Servoy (http://www.servoy.com/)

Sproutcore (http://www.sprotcore.com)

Sencha (http://www.sencha.com)

Each of the above has their strengths and weaknesses, and there are many more frameworks than I can list at the moment, but even with the select list above we can see there are many more contenders in this space than just Cappuccino, Sproutcore, and GWT.

Disclaimer: I'm a co-founder of NOLOH

[edited for clarity]

[m0nty]

sprotcore.com -> sproutcore.com

Thanks for the list :)