MarkDown

• CommonMark: A strongly defined, highly compatible specification of Markdown

• TextBundle: The TextBundle file format aims to provide a more seamless user experience when exchanging plain text files, like Markdown or Fountain, between sandboxed applications.

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Editor

• MarkdownPad is a full-featured Markdown editor for Windows.

• StackEdit: In-browser Markdown editor

• REMARKABLE: THE BEST MARKDOWN EDITOR FOR LINUX AND WINDOWS

• Typora: a markdown editor, markdown reader

• Cmd Markdown: 作业部落

• MaHua:在线编辑器: 一个在线编辑markdown文档的编辑器

• Haroopad

• Mark Text is a Markdown editor for Mac, Windows, and Linux. It is a concise text editor, dedicated to improving your editing efficiency.

• tui.editor: GFM Markdown Wysiwyg Editor - Productive and Extensible

Others

• Academic Markdown and Citations: A workflow with Pandoc, BibTEX, and the editor of your choice

• kramdown (sic, not Kramdown or KramDown, just kramdown) is a free MIT-licensed Ruby library for parsing and converting a superset of Markdown.