Notebook.ai is what I use. The free version has plenty to use and overall has helped me a lot. Source: over 1 year ago

For stuff that involves more worldbuilding I use notebook.ai. Source: over 1 year ago

You could give notebook.ai a try, they support self hosting: https://github.com/indentlabs/notebook. Source: about 2 years ago

I've looked into google docs (ok, but managing between multiple docs is annoying and pulling up references is a pain), notebook.ai (doesnt seem to have simultaneous real-time editing for the writing). Source: about 2 years ago

Hello! I've found this one really great site, called notebook.ai ! I really really like it, but unfortunately there is a paywall to access all of the content. so, I was wondering if anyone here has some alternatives that may help? Thank you!! Source: about 2 years ago

In our project, the change in question affected sixteen content types. Our method of documenting the content model using Mind Map diagrams in Miro meant that we could easily identify the types in question and their elements and codenames. So all we needed was a simple array of content type codenames. - Source: dev.to / almost 2 years ago

In the last 24hrs I came across Mind Map, and I’m already mapping out everything that happened and every little story just waiting to be resolved. So far the service appears to be free and I really could not be happier with it. Source: about 2 years ago

Looks like miro (https://miro.com/mind-map/). Caught my eye too, looks very clean and straightforward. Source: about 3 years ago