Big +1 for tiddlywiki and all of the tools built on it. The single html file really makes it easier to distribute across devices. There's a pretty cool ecosystem built up around it:

https://tiddlywiki.com/#%24%3A%2Fcore%2Fui%2FControlPanel%2F... https://www.reddit.com/r/TiddlyWiki5/wiki/pluginsandresource...