Agar is a toolkit for graphical applications. It features a modern GUI system with an unobtrusive API. Agar can use different graphics interfaces, such as SDL and OpenGL, and it has been ported to numerous platforms, including game consoles and embedded systems. Agar is implemented in C, but can be used from other languages.
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.
Java Supplements is a free library of utility classes which extends and enhances the functionality of the classes provided by the normal Java API. It provides robust and reliable code for doing many of the tasks which Java developers commonly find themselves writing code for again and again, such as catching InterruptedExceptions on Thread.sleep() calls or reading files into a byte array.
Bambookit GUI is a completely XML-scriptable user interface to build real-time interactive Web application front-ends. Applications occupy 100 Kb of device memory and run on any Java-enabled browser. Users can move windows, resize containers, scroll and sort tables, lists, trees, see real-time data display, use a layout manager, and more. All rendering and event handling is managed in the XML scripts.
Taverna is a collection of workflow enactment and description components, including a high level language for workflows called Scufl (Simple Conceptual Unified Flow Language), a pure Java object model, parser to populate the model, and a set of views and controllers (including some Swing components to drop into your workflow-enabled applications). In order to actually run workflows you also need the myGrid workflow enactment engine.
Archetypes is a framework for developing new content types in Plone. The power of Archetypes is first in automatically generating forms, second in providing a library of stock field types, form widgets, and field validators, third in easily integrating custom fields, widgets, and validators, and fourth in automating transformations of rich content.