WDialog is a system to make dialog-centric Web applications. It imitates the behavior of widgets found in GUIs, but acts in an HTML/HTTP environment. It uses its own XML-based UI language, but callbacks are coded in a normal programming language: either O'Caml or Perl. WDialog is written in Objective Caml, an ML variant.
The JScrollDesktopPane Swing component for Java provides a virtual desktop replete with dynamic scroll bars, dynamic menus, and dynamic button shortcuts. The JScrollDesktopPane class surmounts the limitations of the original JDesktopPane Swing component, offering a solution to the clipping and overlap problems inherit to said component, and mimics the interface of the original JDesktopPane to provide an easy upgrade path. It provides a scrolling MDI desktop, one of the most requested features to the Java JDK.
Axualize is a tool for creating applications by actualizing Java objects using XML. Axualize is based on JSR-57, and is intended to allow developers to create Java applications dynamically using XML. To understand how this could be useful, imagine a J2EE application with multiple client UIs being generated from Web applications. Using Axualize, you can present multiple form-based GUI front ends to your application by dropping in a Web application which builds your GUI applications using Axualize XML generated with JSP and whatever application framework you please.