Here is the list of competing products. Let me know if I missed any.
Zopache.com is my blog about Zopache, Grok, Zope, ZODB and Python. It is written in Zopache, and organized as a subject tree.
Use the expandable tree on the left to find the topic of interest to you.
Here is some additional information. You can skip it.
Here I review different options for single page web platforms.
In the zope world, there are many topics that cut across different products. Such subjects are documented in this section.
Zopache is not just a bunch of TTW objects. It is a different computational model than either Zope2, or Grok/ZTK. All three support a ZODB tree of persistent objects with child references. Grok, ZTK and Zopache also have parent references. Unlike Zope 2 TTW, Zopache TTW allows references to remote branches of the tree, making Zopache TTW into a graph database. Unlike ZTK/Grok, Zopache hides both python namespaces, and the Zope Component Architecture from beginners, making them available to advanced developers.
Zope is very interesting. Both hugely promising and hugely difficult. Grok makes it easy to use. Zopache makes it trivial to use. But it still suffers from too much complexity. In particular registering widgets was a terrible idea. More on this in the section on Forms.