"But what on Earth is a TiddlyWiki?" I hear you ask.
Actually, it's kind of hard to describe. Well you've heard of Wikipedia? Imagine a personal version of Wikipedia that contains all your personal content of "whatever" in one easy to use system. Better yet, imagine a system where you don't actually need to use any software other than a web browser. To best describe it, in it's own words it is "a unique non-linear notebook for capturing, organising and sharing complex information."
I am current at the TiddlyWiki European Meetup where we are working on the next versions of the core systems.
You can find your own personal TiddlyWiki at http;//tiddlywiki.com