Sphinex with Read the Docs is one of the most common online app for making software tutorial and manuals.
As an example see the docs for Highlight.js at
See alternatives at the bottom of this post.
I am trying to create TW-Docs app using Tiddlywiki + JD Material theme + JD font-size + some of Kookma plugins (like Shiraz + TOC+Hierarchical navigation + Utility + Favorites) + Comments plugin (not sure on this)
I did most part of the job but there is few things to be resolved before publishing:
1- On the footer of sidebar there is a button v-latest. It lets you to download the whole manual using PDF/HtmlZip/Epub
TW saves as a single .html the whole manual but how about exporting the book (manual) as PDF or epub? (I know printRiver from BTC: difficult to make the book in PDF, needs alot of manual work)
2- The search seems more powerful than Tiddlywiki standard search
It seems Read the Docs is a multi-user app, but I am not going to have TW-Docs a multi user app.
I appreciate to share ideas and solutions.
-- Mohammad
Ps: Alternatives to Read the Docs