JDK contains just a basic set of Swing components. Users usually use also components from other sources. Besides custom components users frequently use components from some 3rd party library. One of such widespread libraries is SwingX library.
It would be nice to create a small module that would integrate this library with NetBeans GUI Builder, i.e., a module that would setup SwingX library in Library manager and create and fill SwingX categor-y/-ies in Palette.
Some time ago NetBeans team cooperated with SwingX team on fine-tuning of their BeanInfos and property editors. It would be good to reestablish this cooperation and verify that SwingX components work well in NetBeans (including installation of SwingX L&F addons and categorization/presentation of properties in Properties window).
*** Bug 213229 has been marked as a duplicate of this bug. ***