Are you looking for a commercial or open source tool? I think Eclipse has an UML plugin. Besides what is mentionned above, another source of ideas could be...

I have seen a recent survey (http://www.methodsandtools.com/dynpoll/oldpoll.php?Outsource) on this topic. Close to 50% are outsourcing programming. What is the situation for your organisation?

A recent poll wanted to know if programming standards are still in use in development organisations... and if they are controlled. The question was: does your organisation implement...

You will find some interesting articles on UML either on DMOZ:
http://dmoz.org/Computers/Programming/Methodologies/Modeling_Languages/Unified_Modeling_Language/Articles/
or in the Methods & Tools...

Here are two good articles on using UML use cases for system analysis:
* Understanding Use Case Modeling
http://www.methodsandtools.com/archive/archive.php?id=24
* Precise Use Cases...