TiddlyWiki is a reusable personal web notebook. It allows anyone to create personal hypertext documents that can be published on the Web, and also search and tag content. The developers write, "TiddlyWiki is designed to be non-linear, structuring content with stories, tags, hyperlinks, and other features. You can organise and retrieve your notes in ways that conform to your personal thought patterns, rather than feel chained to one preset organisational structure. You can use TiddlyWiki as a single file that you view and edit through any web browser, whether you are online or offline. Or you can use it as a powerful Node.js application that stores each of your notes as a separate file."