A flexible unified communications service for collaborative workgroups that can share files, import and export contacts and calendars from a wide variety of data sources and Web services, including Facebook, LinkedIn, Twitter and Google's Gmail. Entirely open-source based.
Price: Varies depending on market and number of user accounts Requirements: Works on a wide variety of browsers and operating systems. We tested it in May 2013.
OpenXchange Inc. 2033 Gateway Place San Jose, CA 95110 408 500 0768 http://ox.io
