http://www.mousetech.com/EJBWizard.html Of course, I'm prejudiced, since I created it and therefore it reflects my needs - though I'm always open to suggestions (It's open source, BTW).
Right now it runs standalone, but it was always intended to be able to hook into IDEs. I'm playing around with an Eclipse integration at the moment.
If money is no object, products with "Enterprise" in their name usually provide an integrated assist. They should, anyway, since many of them cost more than the computer you're using them on.