The package: EVND (Ever Notedown)
So this is a plugin for Atom Editor by Github that acts like an alternate editor for the Evernote Mac Client. Basically it extends Atom's Markdown editing capacities with features like LaTeX/MathJax equation editing, TOC, footnotes, image insertion via pasting, etc. And it communicates with the Evernote Mac Client via AppleScript so it can do things like creating/updating notes (as rendered HTML), import notes from Evernote and convert to Markdown formats, etc.
I initially wrote this for my own use, and over the course of about a year, it has become in