iA Writer - Minimal Design, Maximum Focus
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
MacDown - MacDown is an open source Markdown editor for OS X, released under the MIT License.
Manuskript - Open-source tool for writers.
MWeb - Pro Markdown writing, note taking and static blog generator
FocusWriter - FocusWriter is a fullscreen, distraction-free word processor designed to immerse you as much as...