Try the markdown writer plugin for the Atom. You would most likely be very pleasantly surprised at all the additional functionality that you get out of this great plugin for general markdown editing but with great features to make your static blogging ever so more pleasant!
Atom editor in general is taking pretty good shape. Hopefully I will soon be able to completely switch to Atom from Sublime Text.
Don’t forget the companion markdown preview package to preview your markdown files as you type if you want to.