Most Linux note and text-editing tools do not incorporate Markdown symbols. The real beauty of this feature is that you do not have to use it. You still have a minimalistic yet very efficient note-taking tool that doubles as a Markdown editor.
The Markdown language, created in 2004, lets you write easy-to-use codes in plain text format. This method lets you convert the text to structurally valid XHTML or HTML display if needed.