For some reason, Germany and Open Source go very well together. That's one of the reasons I moved to Germany a good year ago.
Now, I note a new Open Source marketing consultancy popping up in southern Germany. Not that such companies are very tied to geography. It's Sandro Groganz, of Mindquarry and eZ Systems fame, who has set up shop.
Sandro will help companies and organisations, both in their capacities as creators, contributors, and investors. Read more about this on his well-organised blog. Good luck, Sandro!