Notekeeping tool that doesn't lock you in [closed]

Question

We all know that having a good note taking tool is important as a developer.

However, OneNote and Evernote forces us to be locked in to a particular vendor.

Anyone know of good open-source tools, or even other method of taking notes w/o being "locked-in"?

EDIT: I should kick myself in the head for not specifying. Taking text notes is easy. I'd love to be able to write ink notes ( I use a tablet ), add images,and sketch GUI ideas.

Answer 1

Pen and paper.

Answer 2

Try the one file tiddlywiki for which you can get even shared hosting here.