Zettlr is a powerful markdown editor aimed at creating academic texts and notes easier for you on your computers.
MacDown is a customizable markdown editor for your Mac.
Typora is a very simple yet feature-rich markdown editor for your desktop machines.
QOwnNotes is an open source note taking app with markdown support for all major desktop platforms.
Pretext integrates with iCloud Drive and works as a markdown and plain text editor to help you edit your files on iOS devices.
Mark Text is a markdown editor that focuses on the efficiency of editing your content.
ghostwriter is a clean looking and distraction-free markdown editor for Windows and Linux machines.