What framework would you recommend for making desktop-like apps for the web? [closed]

Question

Several frameworks for writing web-based desktop-like applications have recently appeared. E.g. SproutCore and Cappuccino. Do you have any experience using them? What's your impression? Did I miss some other framework?

I've seen related questions on StackOverflow, but they generate mostly standard answers like "use jQuery or MochiKit or MooTools or Dojo or YUI". While some people give non-standard answers, they seem to have little experience using this frameworks.

Can anyone share real experience developing destop-like apps for the browser?

Answer 1

To my point of view, Cappuccino is an example of what NOT to do. They implemented another language on top of JavaScript, which already bring slowliness while browser developer are already fighting hard against, and, what is worst, they don't rely at all on the browser widget, breaking all the user navigation experience. For example, they implemented their own scrollbar, with the main drawback that using mouse wheel won't work anymore!

I really prefer ExtJS's approach which give you rich widgets while keeping the UI as close as possible from the browser.