Great tools and evironment. However, since I am more a user and less technology expert, I am stuggling with question regarding the architecture struture and what is open-source and what not: From your architecture overview I understand that the Zimbra Collaboration Server is somehow the integration platform for all the collaboration clients. However, in your list of what is open-sourced I cannot find the Collaboration server. Thus, is the collaboration server not open-sourced? and is it possible to run the web-based clients also on other types of plaforms?
Thanks for your help with these questions!