Is it possible to create plugins for the Viewer? I haven't found any such examples. If not, is that a capability I could help adding?
I'm interested in adding RSVP capability (a speed reading tool) to Calibre, similar to Stutter:
https://github.com/jamestomasino/stutter
I've seen some old posts about it, but not anywhere it's being worked on. If there's any such work underway, or any other relevant information, I'd appreciate knowing about it!