[Zope] more workflow products ?

Hi There ! Does anybody know some more workflow products than DCWorkflow of CMF, OpenFlow or OOPServer ? They are not really appropriate to my intentions. I'm searching something working near to the base of Zope, sufficient for a really simple Workflow (with only one or two controlling instances for example). I don't only want to handle content, but also handle object changes in the ZODB within the workflow, that's my problem. I am thankful for every further product tipp told to me. Uwe