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StackEdit is a free, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.

Haroopad is a markdown enabled document processor for creating web-friendly documents. You can author various formats of documents such as blog article, slide, presentation, report, and e-mail as if experts did. Haroopad gives you same experiences in editing regardless of the platform you are working on. It runs on all three major operating systems—Windows, Mac OS X, and Linux.

MarkdownPad is a full-featured Markdown editor for Windows. Features: LivePreview : Instantly see how your documents look in HTML as you create them. Easy formatting with keyboard shortcuts. Markdown formatting can be applied (and removed) with handy keyboard shortcuts and toolbar buttons.

ghostwriter is a Windows and Linux text editor for Markdown, which is a plain text markup format created by John Gruber. ghostwriter provides a relaxing, distraction-free writing environment, whether your masterpiece be that next blog post, your school paper, or your NaNoWriMo novel. Here are just a few of its features:

ReText is a simple text editor for Markdown and reStructuredText documents with syntax highlighting and optional live preview.It is written in Python using Qt libraries, able to run on any platforms (Linux and BSD are officially supported).

Abricotine is an open-source markdown editor for desktop.

MarkPad is a Text editor for writing in MarkDown-Syntax. It will display the parsed and styled result to the right side of the plain text on the left.

Moeditor - Your all-purpose markdown editor. Built with Electron / Atom Shell .

Start writing notes, docs, and blogs quickly using Markdown.

Marked takes Markdown text–a simple syntax you can learn in minutes–and turns it into beautiful documents for you. It will update a preview as you work (with several high-quality themes to choose from, or design your own), refreshing every time you save. It can even automatically scroll the preview to where you’re currently editing in your document.

This is the simplest and slickest Markdown editor. Just write Markdown and see what it looks like as you type.The Minimalist Markdown Editor also comes with one-click HTML conversion and other discreet gems.

MarkRight is a simple but very efficient Markdown editor built using Electron and ClojureScript. It uses a dual pane interface that lets you focus on the task of writing, while providing a live preview so you can instantly see the results.

Dillinger is a cloud-enabled, mobile-ready, offline-storage, AngularJS powered HTML5 Markdown editor.