A lot of us built knowledge bases, and we enjoyed it all quite a bit.
I can't live without it :)
Notes, journal, tasks, projects - everything is in there.
Whenever I have a new machine, first thing I do - I open the app =)
A few years ago I played around with copying the Bear app interface for the web, the idea was to create a visually identical mockup of the app so you could immediately visualise changes made when customising various theme values. I stalled with the implementation of the last part, but the rest of it is up at bear.christippett.dev
[1] https://bear.app