TiddlyWiki - your personal web wiki

TiddlyWiki is a really interesting thing. It's what the folks who did it call "a reusable non-linear personal web notebook". It's written in HTML, CSS and also JavaScript and it can become your own wiki. Based on a tutorial, you can even save the entire wiki as a single file can carry it with you on a USB stick. Well, the best way to describe what TiddlyWiki does is just to quote what is on the site. It's quite cool.

A TiddlyWiki is like a blog because it's divided up into neat little chunks, but it encourages you to read it by hyperlinking rather than sequentially: if you like, a non-linear blog analogue that binds the individual microcontent items into a cohesive whole.