I'd go plain text with org-mode, if you are willing to learn a bit of Emacs. Plain text has the advantage of being completely open to scripting. So it can sati

I'd go plain text with org-mode, if you are willing to learn a bit of Emacs. Plain text has the advantage of being completely open to scripting. So it can satisfy any requirements you have down the road. Also easy to version control, etc. Org-mode supports an immense amount of things already, including tags and it derives from an outline mode so it's great for note taking.