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, and Google's Gmail. Entirely open-source based. <br /><br />Price: Begins at $5/user/month for hosted version; $1095/yr for 25 users for server-based software version<br />Requirements: Works on a wide variety of browsers and operating systems. We tested it on IE 7, Firefox 3 and Mac Safari 4 in October 2009.<br /><br />OpenXchange Inc.<br />303 South Broadway <br />Tarrytown, New York 10591<br />914 332-5720<br />http://ox.io
