If you want something just for yourself you might checkout Docuwiki on a USB stick ...
http://www.splitbrain.org/blog/2007-12/01-dokuwiki_on_a_stick
Of course you don't have to run it on a USB stick. You can just download this and zip to a folder and and then start up Apache/PHP with docuwiki all setup to go with the lightest possible config!
Don't miss the latest release (not obvious if you speed read the front page too fast):
http://www.splitbrain.org/blog/2008-05/16-dokuwiki_on_a_stick_2008-05-05
Otherwise XAMPP is great!