XML GUI
Desktop Java Live: XML GUI Frameworks
http://www.clientjava.com/blog/2004/11/26/1101489480000.html
Java Gui Builder
http://jgb.sourceforge.net/index.php
Swing XML Authoring Tool
http://www.swixat.org/docs/index.html
Gumby
http://www.sapia-oss.org/projects/gumby/
Xguitar
http://www.xguitar.org/jp/
gui4j - Swing GUIs in XML
http://www.gui4j.net/
XUL
http://piro.sakura.ne.jp/xul/tips/
http://www.smellman.homelinux.org/mozilla/xulapp.html