Useful reveal.js plugins

The list is somewhat hidden but here is the link https://github.com/hakimel/reveal.js/wiki/Plugins,-Tools-and-Hardware
My preference is

dependencies: [
{ src: 'library/reveal.js/lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'library/reveal.js/plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
{ src: 'library/reveal.js/plugin/zoom-js/zoom.js', async: true },
{ src: "library/speech.js",
callback: function() {
RevealSpeech.configure({
nextKeyword: 'nextslide', 
prevKeyword: 'previousslide',
lastKeyword: 'lastslide',
firstKeyword: 'firstslide',
debug: true,
lang: 'en-GB' // default de-DE
});
}

plus zenpen in an iframe.

The slide builders at the plugin page are quite useless except for slides.com which is, however, too expensive.
I therefore design everything in Keynote, export as jpg and loop over all jpgs to write the section tags.

The best option would certainly be if Apple would directly support reveal.js and not some fancy own HTML formats

slide/assets/7D643FA7-9A1F-45A5-A30F-7828735F3C35/7D643FA7-9A1F-45A5-A30F-7828735F3C35.json

Or is anyone willing to write a converter?