If you haven't checked out Desk app on the Mac and you like minimal, useful text editors, then this is worth looking in to.
This apps big thing is focusing on a beautiful editor with the ability to publish directly from the app to your blog. It supports both Markdown and WSYIWYG and is very smooth.
Honestly one of the things I've enjoyed the most about my discovery of this app is the developer's blog. John and the Desk app are the epitome of a Mac indie developer and it's been really fun to follow him on his journey of the release and relative success of Desk. If you're interested you should check out the app or just follow his blog.