Something I'm playing around with right now. Almost like a simple blog but it only runs on your personal PC. I've set it up with a quick link in my toolbar so I can instantly go to it while browsing around. I'm using it to quickly post notes when I see a good idea somewhere online that I might want to use. Beats having to browse the menus to notepad or Word or some other such program to type up a quick note. Plus it's free open source software. Just a simple HTML page is all it is.

www.tiddlywiki.com