Slack - A messaging app for teams who see through the Earth!
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Jostle - A new kind of employee intranet that drives engagement & workplace culture. Achieves social participation in work relevant way. Participation rates are over 85%.
Mattermost - Mattermost is an open source alternative to Slack.
Workplace by Facebook - Connect everyone in your company and turn ideas into action.