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.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Communifire - Enterprise Social Collaboration Software
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.