TiddlyWiki - a reusable non-linear personal web notebook

TiddlyWiki - a reusable non-linear personal web notebook: "TiddlyWiki, a popular free MicroContent WikiWikiWeb created by JeremyRuston and a busy Community of independent developers. It's written in HTML, CSS and JavaScript to run on any modern browser without needing any ServerSide logic. It allows anyone to create personal SelfContained hypertext documents that can be posted to a WebServer, sent by email or kept on a USB thumb drive to make a WikiOnAStick."