I've been looking into all sorts of them recently: logseq, appflowy, vikunja, etc. What tools do you use? Why? What problems did you run into with the previous set of tools you used for this job?
Right now I'm primarily interested in finding a "zero-knowledge" (cloud provider doesn't have access to my data) system for task management. Needs to be able to have recurring tasks and tasks organized in some interesting/useful ways (by projects/labels/something, maybe a kanban and table view). Deadlines and time tracking/planning interesting but not required.
I’ve been using todo.txt for tasks for about a month now—it’s dead simple, supports all the bells and whistles you mentioned; and, with the topydo CLI, you can very easily make yourself a kanban interface using its columns UI. I sync the files with my iPhone and use Todooo on iOS, which works beautifully.
As for notes, I just write simple text files with my favorite editor. Maintaining complex systems of interconnected notes, I’ve found, most often does not pay off for the enormous time investment required (some specific use cases aside); tags, links, etc. I have all found to be superfluous—any kind of
grepintegration in the editor is all that’s needed for finding things. I write in either markdown or Typst, because basic Typst is essentially the same as markdown anyway, and because I’ve found it very useful to keep notes in the same format I write longer-form documents in.