HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
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.
Rivers IM - Simple, fast & secure team collaboration platform
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
P2 - Share, discuss, and collab with your team. By Wordpress.
Communifire - Enterprise Social Collaboration Software