Download Zimbra - A Free Messaging And Collaboration - Client And Server Platform Zimbra is a feature rich open source groupware which does a whole lot of seemingly impossible tasks using the web browser. It does chat in a secure mode, file-sharing, task management, iPhone interface and many more. Zimbra, with its Desktop program, allows you to be in the browser mode even … [Read more...] about Free Messaging And Collaboration – Client And Server Platform