Thank you for your kind words. The first two could already be done with the help of the scripting engine and Pandoc...

The first two could already be done with the help of the scripting engine and Pandoc

Hmm OK, I'll have to look into that a bit more. Could I have menu integration and everything with that method? i.e. right-click on the notes I want to export and select something from the context menu?

right-click on the notes I want to export and select something from the context menu?

yes, that works

Here a pandoc example: https://github.com/qownnotes/scripts/blob/master/paste-html-as-github-markdown/paste-html-as-github-markdown.qml

And you might need this http://docs.qownnotes.org/en/develop/scripting/README.html#getting-a-list-of-the-paths-of-all-selected-notes and http://docs.qownnotes.org/en/develop/scripting/README.html#registering-a-custom-action.

Thanks very much for the examples, I'll see if I can cobble something together.

https://github.com/qownnotes/scripts is the place to put it if you have come up with something. ;)