crimson090

Adds buttons to the Text (HTML) edit which generate Markdown syntax. These buttons serve as a great introduction to 
users who are new to Markdown, as well as shortcuts for more experienced users. The buttons include:
<ul>
<li>Bold</li>
<li>Italic</li>
<li>Blockquote</li>
<li>Link</li>
<li>Code</li>
<li>Table</li>
<li>Headers</li>
<li>Help (links to external Github Markdown guide)</li>
</ul>
This plugin does not modify the Visual editor, as that editor is not ideal for writing Markdown in. It’s recommended you disable 
the Visual editor entirely to enforce using Markdown.
Note that this plugin does not render Markdown. You should use a plugin (such as Jetpack Markdown) to render markdown in your theme.

MarkdownBar

Adds a toolbar of buttons to the Text (HTML) edit which generate Markdown syntax

Maedah Batool

Ahmad Awais

<h4>Major Update Due Soon!</h4>
This plugin is getting a major update soon.
WP Super Edit is designed to get control of the WordPress wysiwyg visual editor and add some functionality with more buttons and customized TinyMCE plugins. WP Super edit acts as framework for TinyMCE visual editor plugins and buttons allowing administrators (or users) to arrange buttons and add TinyMCE plugins to the visual editor.
Your feedback is always welcome!
Features
<ul>
<li>Drag and Drop interface for arranging the WordPress visual editor buttons.</li>
<li>Access to built-in WordPress visual editor buttons and functions.</li>
<li>Additional TinyMCE plugins to add buttons and features like tables, layers (div tag), advanced XHTML properties, advanced image and link properties, WordPress emoticons, style attributes, css classes for themes, search / replace, and more.</li>
<li>Options for allowing users to configure visual editor settings; One editor setting for all users, role based editor settings, and individual user editor settings. Only WordPress administrators can activate or deactivate TinyMCE wysiwyg visual editor plugins. In single or role based modes, only administrators can arrange editor buttons.</li>
<li>Easy to install and remove. WP Super Edit uses separate database tables for settings and to support multi-site configurations. Currently only the Super Emoticon / Icon Plugin will leave short tags in your posts or pages.</li>
</ul>
Version Notice
This version has been tested for use with the versions of WordPress indicated. I attempt to keep WP Super Edit up to date with changes to WordPress and the visual editor, but the complex changes can make it unproductive to maintain compatiblity with some older versions of WordPress. This is a list of recent versions available for older WordPress sites.
<ul>
<li>Use WP Super Edit 2.1 for WordPress 2.6 to 2.7.1</li>
<li>Use WP Super Edit 2.3.x for WordPress 2.8 to 3.1.x</li>
<li>Use WP Super Edit 2.4.x for WordPress 3.1 to 3.8.x</li>
</ul>
<a href="https://wordpress.org/extend/plugins/wp-super-edit/download/" rel="ugc">Download Older Versions of WP Super Edit</a>

WP Super Edit

Get control of the WordPress wysiwyg visual editor and add some functionality with more buttons and custom TinyMCE plugins.

MarkdownBar vs WP Super Edit