GUI

• JFace

JFace is a UI toolkit with classes for handling many common UI programming tasks. JFace is window-system-independent in both its API and implementation, and is designed to work with SWT without hiding it.
http://wiki.eclipse.org/index.php/JFace

• Struts Tiles

Struts Tiles component is a templating system. (Include on steriods.) It can be used to create a common look and feel for a web application. Tiles can also be used to create reusable view components.
http://struts.apache.org/1.x/struts-tiles/