title: GUI builder for web apps
body: <p>What is the best GUI builder for web apps (any language) that can hook into the backend code, in that it is compatible with dynamically generated web pages and can submit Ajax requests? </p>
  
  <p>As a side note, is there such a GUI builder for java based web apps (i.e. Play Framework)</p>
  
  <p>I'm kinda looking for something similar to Interface Builder for Iphone and Android, but for web apps.</p>