From Wikipedia - TiddlyWiki:
TiddlyWiki is a wiki-modeled client-side single-page application
Does anyone know of anything else like TiddlyWiki? It seems to stand alone in its field.
Specifically, it is a self contained single file that modifies its own content. Besides a web browser nothing else needed to change the page(s) content. It can be accessed via
file:/// without a server and change the content.