Yet Another NetBeans Platform Application: Oracle JDeveloper 12c
By Geertjan on Jul 11, 2013
In the release notes, notice paragraphs such as this: "The JDeveloper and NetBeans teams are working together to bring the best of each of its Java UI visual editing tools to all users. This release introduces the "Matisse" editor from NetBeans in JDeveloper."
There's been a bit of activity on Twitter about these developments, which are described in historical detail at Jaroslav Tulach's blog, specifically here: http://wiki.apidesign.org/wiki/JDeveloper