I don't have a whole lot that are public. This section describes one of advanced features I use most:
http://breuleux.github.io/quaint/syntax.html#rulesI've used it to create operators for stuff like:
* Lead caps
* Formatting dialogue in a screenplay
* Marking something that's a prop in a screenplay
* Parametric links (e.g. defining @john so that it creates a link to the john handle on X/Twitter)
* Tooltips