smil
aeneas is a Python/C library and a set of tools to automagically synchronize audio and text (aka forced alignment)
Turn an audiobook and the matching ebook you own into one EPUB 3 with Media Overlays.
SVG Frame-by-Frame Animation Generator svg2fbf - Create SVG animations from a series of SVG frames without the need of javascript or css.
Turn text EPUBs into offline read-alongs: EPUB 3 Media Overlays narrated by local Kokoro TTS, highlighting each sentence as it reads.
