[Zope] Project management tools written in Zope?

Does anyone out there know of any Zope-based project management tools? Or, for that matter, any open-source software that does project-management tasks? Stuff like: -tracking time estimates and actual hours logged on a project/task -tracking billing rates for different employees or kinds of work -tracking project phases and scheduling this has been mentioned as a major lack on another list I'm on (linuxchix), and i want to see if there's a Zope solution I can evangelize and/or recruit developers for. srl