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. <br /><br />Price: Varies depending on market and number of user accounts <br />Requirements: Works on a wide variety of browsers and operating systems. We tested it in May 2013. <br /><br />OpenXchange Inc. <br />2033 Gateway Place <br />San Jose, CA 95110 <br />408 500 0768 <br />http://ox.io
