0.9.5stable and beyond... USE THE EGGS! get CalendarX via egg or tarball at Pypi or dist.plone.org. CalendarX is a feature-rich calendar and event CMS built in python using Plone and Archetypes. Event categories (metacalendar) and more.
A Plone, Archetypes based product which provides reminder objects (a new eventlike content type) and a tool for processing reminder objects periodically.
MightyCal is a web-based calendaring system that aims to be the "MS Access {tm}" of the calendaring world. Built on Zope and Apache Cocoon, MightyCal provides the ability to develop custom calendars, with output in HTML, PDF, RTF & many other formats
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