Please include wysihtml5 on your list :)

http://xing.github.io/wysihtml5/

Sadly, while the Scribe developers correctly identified all the various problems with contenteditable (https://github.com/guardian/scribe/blob/master/BROWSERINCONS...), they chose to solve it like most other editors: by using execCommand, waiting for the browser to make a change, and then attempting to clean it up afterwards.

Trix's thesis is that this approach is fundamentally broken. Instead, Trix updates an internal document model on each input event, then re-renders the editor contents in response.

We are using Scribe for our product and we are happy with it. It lacks some documentation but it's solid.

I tried Scribe and was quite enthused about it but there are trivial bugs that never got fixed, been a year since I filed this issue[1]:

Basically, http://jsfiddle.net/L59kL1rf/ -- you cannot delete the first paragraph and always end up with <p><br /></p> and if you try to delete that it just starts acting strange. This issue has been open since 2014 and it seems it's a bug in the core.

There were other similar issues I ran into around the same and decided I would revisit later but it's been a nearly a year since.

[1]: https://github.com/guardian/scribe/issues/300