OpenBoard - The OpenBoard software is an interactive white board software.
Confluence - Confluence is content collaboration software that changes how modern teams work
Conceptboard - Instant Whiteboards for Teams & Projects
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
IDroo - A shared whiteboard for use by multiple Skype-users simultaneously. Features
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.