Anybody who ever came into contact with RUP (which is the name of Rational's -- now IBM's -- version of the Unified Process) may have stumbled upon their web application created to support the process. In there you can find work flows, actor and artifact definitions, templates etc etc.
I did, come across it some ten or so years ago. Since then I've had the (mis)fortune to work at companies with their own "UP" or what-have-you-versions of development processes. However, imagine my surprise and delight when I came across an Open version of UP (sponsored by the Eclipse project) with the web application, the actors and templates and all.