Simple, free and open source markdown editor for Android.

mdBook is a command line tool to create books with Markdown. It is ideal for creating product or API documentation, tutorials, course materials or anything that requires a clean, easily navigable and customizable presentation.

Convert markdown formatted text to mind map

Google drive extension that uses markdown

Using an external filter, pandoc-citeproc, pandoc can automatically generate citations and a bibliography in a number of styles. Basic usage is

Browser extension to copy hyperlinks, images, and selected text as Markdown

An open source note taking and to-do application with synchronisation capabilities.

If you need to convert files from one markup format into another, pandoc is your swiss-army knife. Pandoc can convert between a wide range of formats.