Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
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.
Frost for Facebook - Frost is a third party Facebook wrapper geared towards design and functionality
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Communifire - Enterprise Social Collaboration Software