If you are selling digital product on envato or anyother marketplace. Creating documentation is very boring process. XDocs is WordPress plugin to create product offline and online docs. You can create as many docs as you want by just using simple post and you can also download this document with same theme. XDocs is using its own theme system so you don’t have to install any extra WordPress or any theme.
Demo: https://codecanyon.net/item/x-docs-wordpress-product-documentation-creator/16986295