I'm pretty happy with Gollum (https://github.com/gollum/gollum/wiki https://github.com/gollum/gollum/wiki) for this. Your data is just a Git repository containi

I'm pretty happy with Gollum (https://github.com/gollum/gollum/wiki https://github.com/gollum/gollum/wiki) for this. Your data is just a Git repository containing a hierarchy of files. You run Gollum to fire up a local web server, which gives you a wiki interface to view and edit any Markdown files in the hierarchy. You can use a local Markdown editor if you prefer, as long as you commit your changes. You can choose whether to run Gollum all the time and expose the server to others, or just launch it locally when you want to browse your own repository. And you can use Git to create, push and pull branches. Gollum also seems to have powerful customisation features like macros and YAML front matter, but I have yet to make use of them. For now, Gollum suits me as a simple, free alternative to Confluence. Notion is obviously a far more powerful product.