Only the text-editor.
I know, that the real developer can't understand it, but I don't like NetBeans and Eclipse.
Netbeans have the advantage, that a minimal documentation is integrated. And it shows you, if you have something written wrong or which classes exists, etc.
But what I don't like is, that after every restart of NetBeans, I am again there, where I have ended.
I like it, if I have something changed wrong in the IDE or so, to restart it. But if I am again on the same state, it helps me not much.
And deleting the ".netbeans" directory in the home-directory helps not much, too. If I then start NetBeans again, it needs a very long time to start. And don't work like the first start after the install of it.