Reusing the Matisse GUI Builder
By Geertjan on Oct 13, 2009
You can create a module that removes all the existing palette items and then add your own:
In fact, Tim Boudreau recently took this approach at a customer consultancy and has produced this tutorial which describes how to bundle a JavaBean (together with a custom editor) for use by the Matisse GUI Builder:
And, that's currently the newest NetBeans Platform tutorial!