• Cloud-Based Intranet Software for Employee Engagement | Jostle
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• Communities - Google+
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• Igloo is an intranet you'll actually like
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• Piazza • Ask. Answer. Explore. Whenever.
  Education-centred intranet "Wiki style format enables collaboration in a single space Features LaTeX editor, highlighted syntax and code blocking Questions and posts needing immediate action are highlighted Instructors endorse answers to keep the class on track Anonymous posting encourages every student to participate Highly customizable online polls Integrates with every major LMS and is FERPA compliant"
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• Yammer
  Free for academic institutions
  in Virtual communities with intranet tool vc

intranet from all users