I just read an interesting overview of the JSR-296 Framework. It basically takes away the mundane setup of your main application frame. I think many individuals have been using Eclipse RCP and NetBeans Application Framework to accomplish this in much too heavyweight a fashion. JSR-296 provides a very simple and lightweight way to restore application UI state, set up the main application title, and set the default close operation.
Read more about it at this DZone article by Geertjan Wielenga.