Best GUI Builder for Java/Swing
Any good *recent* (Java 6+) Swing GUI builders the SO community would like to recommend?  Some features I'm interested in:

<ul>
<li>Open source - great if its open but not hard requirement</li>
<li>Null layout managers - allow me to drag-n-drop controls where I want them</li>
<li>Custom controls</li>
<li>Design/Code split view or the ability to toggle back and forth</li>
</ul>

Thanks for any suggestions!
Best GUI Builder for Java/Swing
===

Any good *recent* (Java 6+) Swing GUI builders the SO community would like to recommend?  Some features I'm interested in:

<ul>
<li>Open source - great if its open but not hard requirement</li>
<li>Null layout managers - allow me to drag-n-drop controls where I want them</li>
<li>Custom controls</li>
<li>Design/Code split view or the ability to toggle back and forth</li>
</ul>

Thanks for any suggestions!