Introducing Bootstrap Studio
I know this is a Bootstrap tool, which means it has baggage.But if something like this existed for email, I would buy it in a snap.
I have yet to find a desktop tool that can make decent responsive html emails, and that is one of the main strengths that Bootstrap should offer. Skip the JQ efects.Perhaps you can make a email mode that is JS free, strips out the unused CSS, and inlines the remaining rules?