This NetBeansplugin adds support for Coco/R to the NetBeans IDE. Coco/R is a compiler generator that takes an attributed grammar and delivers scanner and parser for the language, described by the grammar.
BeanClipse is a NetBeansplugin for Eclipse: NetBeans runs embedded within the Eclipse platform as a plugin offering the best of both worlds to Java developers.
May be just a joke ;-) ....
Check also it's twin at : http://sf.net/projects/netclipse