MarsEdit - MarsEdit is a desktop blog editing application for the Mac. It provides an offline interface to most popular blogging systems. WordPress, Blogger, Tumblr, Movable Type, and many other systems are supported.
Medium - Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.
Desk - An award-winning & beloved desktop publishing client, exclusively for OS X.
Ghost - Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.
BlogDesk - Blogging should be simple, but it gets complicated and time-consuming if you are serious about it.
Tumblr - A feature rich and free blog hosting platform offering professional and fully customizable templates, bookmarklets, photos, mobile apps, and social network integration.