[Zope] Is there a Zope base file manager product?

Hi, I'd like to know if there is a web-based file manager built on top of Zope or CMF. Ideally, I'd like to integrate a file manager in a CMF or Plone site in order to browse and modify the filesystem through the web. As a bonus, the product should be able to handle multiple users and their rights on Unix correctly. Thanks -- Farzad FARID <farzy@farzy.org> http://www.farzy.org/