Is there a “Workflow Engine” implementation for Delphi?

Question

For (application) server development with Delphi, I would like to use a workflow engine similar to the existing implementations for other programming languages (see http://en.wikipedia.org/wiki/Workflow_engine). Is there already an implementation or should I better write my own?

Answer 1

There is another one:

Workflow studio from Tms Software

http://www.tmssoftware.com/site/workflow.asp

Answer 2

There's a commercial product Common Knowledge which incorporates workflow and business rules.