https://github.com/gollum/gollum
Edit and view pages as a normal markdown wiki. But the backend is just a git repository of markdown files so you can also just use your text editor and git pull/push. Usable by any novice but with the ideal power user interface.
Super handy for devs who both dev and wiki doc.
Or like Obsidian for business people.
Or Notion but can (optionally) work offline.
https://www.craft.do/solutions/businesses
https://www.craft.do/solutions/remoteteams
https://www.craft.do/solutions/individuals