Simple wiki-like desktop note taking / organization software
I am looking to organize myself a bit better this year. I've had a rather bad habit of putting my to-do lists and notes in plain text files. It seemed the simplest. I would just put them on the desktop and add notes or to-do items as I need to. However, I end up having quite a few of them thrown around the desktop with a few quite bloated ones. It would've been better to have a wiki-like desktop tool where I can put and link all my notes in one place coherently.
Klepas suggested moinmoin wiki software before, but that needs a special python setup and works in a web browser. There is also tomboy, but besides being in mono (and hence having some hefty dependencies) I am looking for something a little bit lighter.
So, if you have any recommendations for a tool which can be useful for note-taking and work organization in general that you found useful, I'd appreciate your suggestion.