TiddlyWiki

http://www.tiddlywiki.com/

not often do I fall for an application.. but this one made it to my list on the first site ;)
it's a quick wiki, very usable and damn too easy to deploy..
almost puts xcopy deployment to shame :D

here's what u need to do..

• download the html page (using a link that appears on the homepage)..
• run it inna browser of ur choice..

oh well, that's all u need to do.. u can start using it straightaway, unless u don't like the way it looks n wanna do some plastic surgery, which btw u can easily achieve since all the source is in the page that u've downloaded :)

took me less than 5 minutes to get the whole thing and ftp it over to Pandela (a decent free hosting that I use).. another minute to open it from the hosted location and use it :)

haven't seen anything simpler :)