FLOSS app / paid services: a good exemple?

[mr_lars]

Hi all, I'm helping a friend to define his site, offering consultancy about floss implementation.
Can you suggest me good exemples of this communication/business approach?

I like
http://www.silverstripe.com/what-we-do/
http://www.knowledgetree.com/
http://www.jboss.com/

there's better around?

thank you, mr_lars

[mr_lars]

bump...
no ideas?
it's not the right place where to post?