superhypertext options
> tangle: explorable explanations
> project naptha: text from visuals
> imagus: hover zoom preview visuals
> spritz: speed reader
> beeline: colored line breaks
> +
> list stuff you'd want in superhypertext
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specs
> vocal text: plain text/speech sync 
> pix8: own better pix, faster
> twext: align tag, timing, translation, toggle