MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
Yammer - Yammer is a leading enterprise social network used by more than 200,000 companies worldwide, including 85% of the Fortune 500, to get work done smarter and faster. Sign Up Today.
Linchpin - Confluence-based intranet Fully personalized collaboration hub View this video on YouTube. Download a file for offline use (MP4, 63 MB). Test Linchpin for free
Alfresco Community Edition - This page explains where to access the various versions of Alfresco. For General Use Alfresco Community Edition Alfresco Community Edition provides
Communifire - Enterprise Social Collaboration Software
opendocman - OpenDocMan is a free document management system written in PHP.