Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Slack - A messaging app for teams who see through the Earth!
Perfect Wiki - Build and organize your knowledge base of company resources without switching between workspaces
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
Pages by Process Street - Pages is a free-for-everyone knowledge base from Process Street.Try it out!
Jostle - A new kind of employee intranet that drives engagement & workplace culture. Achieves social participation in work relevant way. Participation rates are over 85%.