other possible additions

[caub]

I'd propose one I made: https://caub.github.io/cms/wysi/

I tested around 10 of the most known wysiwygs, (+ some not in your list: http://prosemirror.net/, https://imperavi.com/redactor/, http://facebook.github.io/draft-js/, I can add them with a review)

My former boss and me always found issues and difficulties to customize them to his needs, so the one I built is mostly a flexible interface, sticking to a contenteditable, it's not too much customizable yet, the sources aren't published yet, but if the former company agrees they could be disclosed. I'd be glad if people extend it, the sources are quite short and modular.

[dandv]

UPDATE: my work on this project has moved to my personal repo. Please star/watch that one instead, and feel free to file this issue there.