[Zope] Hierarchical content

I want to be able to create content and then attach sub-content to it. For example, if tasks were the content, it would look like the following: go shopping get bananas get bread pick up cleaning get shirt get pants clean house clean kitchen clean mixer clean clean sink clean bedroom I don't want to have the overhead of creating and sifting through folders as you navigate the hierarchy. In order to do this, I need the ability to have content that has folderish properties allowing sub content. Is there a product out there that has similar characteristics? If I were to build this, what tools within plone would I use?