Microsoft acquired Skype last year, and Office 2013 will be the first of Redmond's office suites to incorporate the popular VoIP service. You can integrate Skype contacts with Microsoft's enterprise-oriented Lync communications platform for calling and instant messaging. And Office subscribers get 60 minutes of Skype international calls each month. There's room for improvement, though. Skype integration doesn't appear to be a major priority in the preview version of Outlook 2013.