I just released the "JCR Controller" application.
I use the application to control my own JCR repositories, so it's well suited for my own needs. I think it can also be useful for other JCR developers. The JCR controller can browse and edit existing Jackrabbit JCR repositories. It's a Java Webstart application and can be started at; http://www.xs4all.nl/~weertj/jcr/index.html Greetings, Jacco van Weert
