Vanilla JavaScript Plugin

tail.writer  

A light-weight and powerful GitHub Flavored Markdown editor.

Plugin Website  Demo

Related plugins

TinyMCE WYSIWYG Editor  

A sophisticated HTML WYSIWYG editor control with manifold customization options, skins, and plugins.

Quill Rich Text Editor  

A free WYSIWYG editor for the modern web. With its extensible architecture and a expressive API you can completely customize it to fulfill your needs.

mark.js  

A highlighter plugin that can be used to dynamically mark search terms or custom regular expressions in any text.