In Plone 5 we have support for the After The Deadline Plugin in TinyMCE: https://afterthedeadline.com/
We also have an endpoint (@@checkDocument) and a IATDProxyView interface.
I have never used this and I'm not even sure if this still works.
Does anyone use this feature?
@polyester tnx for the reply. I'd also go for the suggestion to remove AtD from core and eventually provide it as a add-on, as suggested by @jensens .
Not sure if everyone agrees with that.