GWT, Cappuccino, Sproutcore: AJAX-Framework-Shootout

For a look at what we have done with GWT, check out TeamPostgreSQL (<a href="http://www.teampostgresql.com" rel="nofollow">http://www.teampostgresql.com</a>).<p>It is a fairly complex web application both in terms of UI and functionality, developed and maintained by essentially one guy, which IMHO speaks volumes about the power of GWT to produce and manage AJAX application code. All of the code base contains zero lines of Javascript - it is all regular Java classes.

Another one worth mentioning is qooxdoo, which I'm currently evaluating. I would probably go with Cappuccino if I had more experience with Cocoa/Objective-C. However, qooxdoo seems more approachable if you don't have the Cocoa background -- it's surprisingly well documented. Although it doesn't look as visually appealing out of the box, you can create a custom theme.

On the note of cappuccino looking awesome (which it totally does) this kind of shows how GWT could look: <a href="http://demo.vaadin.com/sampler/#Components/Forms/FormBasic" rel="nofollow">http://demo.vaadin.com/sampler/#Components/Forms/FormBasic</a> (haven't used it myself though).

Apple has one due to come out this year called Gianduia ... and that's about all I know about it. People I trust who know more are absolutely raving about it, but, typically, details are scarce on the ground. Am very interested to see what arrives, though.

Cappuccino also has nib2cib now which allows you use inetrface builder which is great if you are coming from a mac background. Also there is Script# for people .net. Personally I prefer cappuccino.