TiddlyWiki

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 machinery to be able to display it, and let you edit it or search it - without needing a server. Of course, there are also some useful ServerSide adaptations out there.

Unlike most wikis, TiddlyWiki isn't about group collaboration; it is a wiki in the sense of elevating linking be a part of the punctuation of writing. You can easily publish a TiddlyWiki you have created by placing the single file on a web server (for instance the homepage hosting provided by many ISPs). If you need full group collaboration features, there are several HostedOptions to choose from.

TiddlyWiki was originally created by JeremyRuston and is now a thriving open source project with a busy Community of independent developers. Osmosoft, part of BT, is the leading contributor to the project.