TiddlyWiki is a mature single-file application, written in HTML, CSS and JavaScript, designed to run on any modern browser without any server-side requirements.
TiddlyWiki can be used for personal, self-contained hypertext documents that can be posted to any web-server, sent by e-mail, kept on a USB thumb drive or stored, and run, from a common cloud storage service.
TiddlyWiki is highly customizable, with a plethora of addons and options for extensions.
TiddlyWiki is supported and developed by an active community of developers and users.