[Zope] Zope for managing software projects

I'm new to Zope (but old to Python). I and several colleagues are interested in coordinating software projects among groups of contractors. We often have to work behind firewalls and must rely on HTTP. I'm wondering if anyone has built (1) Zope-based bug-tracking databases (2) Zope-based version control systems I'm vaguely aware that WebDAV is relevant, but cannot figure out if it is an internal technology for Zope, or how to apply it (webdav.zope.org seems not to respond). Many thanks, Andy Robinson