Confluence - Confluence is content collaboration software that changes how modern teams work
Beyond Compare - Beyond Compare allows you to compare files and folders.
MS SharePoint - Share, organize, and discover information with Microsoft SharePoint. Learn about SharePoint Online, OneDrive for Business, and Apps for SharePoint
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.