Caret - Better Markdown Editor for Mac / Windows / Linux
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
Jekyll-Markdown - An elegant markdown blog generator using Jekyll
MWeb - Pro Markdown writing, note taking and static blog generator
LightPaper - Admired by thousands, LightPaper is a powerful markdown editor with features such as Multi-Tabs, Folder Navigator, Distraction Free Mode, Quick Open, Live Preview, Full GFM Support, Math rendering etc.
Loose Leaves for Mac - Instantly share what you write in Markdown