TiddlyWiki is a complete wiki in a single HTML file. It contains the entire text of the wiki, and all the JavaScript, CSS and HTML goodness to be able to display it,
and let you edit it or search it.

Without needing a server.

TiddlyWiki - a reusable non-linear personal web notebook

Umibozu is a cross-platform wiki-based photo album generator, designed to facilitate publications and updates
of photos on the web.

Umibozu - wikify your web album