I use Typora daily. I use it as my daybook and to edit content for articles and my newsletter. It's a great -- the best -- markdown editor. It is a native Mac app, so it inherently works offline, and I keep all the docs in folders that are synced to Dropbox. So I can access them anywhere via browser, and share them with others. Those I share with don't have to use Typora, since the docs are standard '.md' files, but I recommend it.
I just wish Typora had a Google Docs-style commenting interface, for collaboration. Otherwise, awesome.