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.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Desk - An award-winning & beloved desktop publishing client, exclusively for OS X.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
BlogDesk - Blogging should be simple, but it gets complicated and time-consuming if you are serious about it.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.