Slack - A messaging app for teams who see through the Earth!
eXo Platform - Digital workplace solution
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
Basecamp - A simple and elegant project management system.
Jostle - A new kind of employee intranet that drives engagement & workplace culture. Achieves social participation in work relevant way. Participation rates are over 85%.
BuddyPress - WordPress social networking in a box.