Open Source Friendly Game Companies, Anyone?

Hi everyone. I'm looking for a game company (or something similar) in Germany or USA that is "Open Source friendly". By that I mean:

• Prefers to develop on a Linux operating system
  
• Makes use of one or more open source libraries
• Prefers to use tools that are open source based (not only for source code management and versioning, but also for content creation)
  
• Actively participates in development of open source libraries

This is entirely target independent. You may develop for any platform you wish. If you think you may work for such a company, or you know a company that works this way, please let me know. Thanks a lot.