An awt component library for Java 1.1. Some of the classes included in the library are: Animated Checkbox, Date Selector, Tab Folder, Image Button, Image Panel. [Open source, LGPL]
A MDI (multiple document interface) application framework for Java/Swing with document-view architecture, support for undo/redo operations, clipboard data transfer, modular file i/o, internationalization. [Open source, GPL]
A Swing component (JTable, JTextPane, JTree, ...) printing framework. It includes custom Page Setup, Print Preview, and Print dialogs, and the ability to preview and print any Java Swing GUI component. [Commercial]