Draft is one of my FAVORITE products. I use it daily and pay $4/mo not for any additional functionality but because I want to support the product and Nathan Kontny (who just happens to be a great guy). I wrote about this here: http://ryanhoover.me/post/490198...
The amount of work and passion for details in Draft is impressive. I really love it. Some key features:
- Hemingway mode: you are not allowed to edit anything until you turn it off
- Ask for revision: send an email to your friends and reviewers, their revisions can be accepted or refused (works like git)
- One click publishing to Wordpress, Twitter, Blogger
Lex