Some random thoughts about #TiddlyWiki, which is - in my opinion - a very interesting piece of free and open source software targeted at end-users.

http://tiddlywiki.com/

It's a personal note-taking app which can be stored in a single HTML file (including JavaScript code and content).

The TiddlyWiki file can be saved locally or uploaded to a server, and it can be encrypted end-to-end. Installation on Node.js is possible, too, with slightly different features. 1/

Despite its qualities, #TiddlyWiki is probably going to stay niche for the following reasons:

1.) Many of its features require inserting code (markup) into the text fields.
2.) Many features aren't very well documented.

With regards to 1.), TiddlyWiki isn't very different from MS Word or Excel, in my opinion. They often require macros, and Excel formulas can get quite complicated, too.

However, MS has greater market(ing) power, and documentation tends to be better, too. 2/

@stefanieschulte yes, love tiddlywiki, tried forever to get it operate offline & just held out hope for non coder that with the entire file being right there, that i could modify design to my taste
@magenta TiddlyWiki should work offline, as far as I know. It's possible to modify the design a bit in the GUI, but for more far-reaching changes to the existing themes, HTML and CSS are probably required.