As I am working from a Mac, I use MacDown for Markdown. I am very happy with it. I usually use the images from unsplash.com with some layouts from canva.com. And I also at first publish it on a personal blog first, and then on dev.to through the RSS feed. For version control and history of the texts, I use Bitbucket and local disk backups.
As for a plugin to direct publish from an editor to the target platform, I think, it is essential before publishing to be able to see the style of your blog post on that platform.
Thanks for sharing!
I was using MacDown but I'm all Typora now..
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