WP Lab

This plugin will improve the build in theme and plugin editor in WordPress with typical code editor features like syntax highlighting. It is very lightweight, since it will simply replace the default textarea with an instance of <a href="http://ace.ajax.org/" rel="nofollow ugc">ACE</a>.
<h4>Features</h4>
<ul>
<li>syntax highlighting with themes</li>
<li>code folding</li>
<li>line numbering</li>
<li>highlight matching parentheses</li>
<li>auto indentation and outdent</li>
</ul>
<h4>Use cases</h4>
Sometimes, you need to make some small adjustments on a theme or fix some bug in a plugin – but either you don’t have ftp acces or maybe you are on the road and don’t have access to your code editor. Then Ace Editor will come in handy and help you doing your work – with less chances of typos thanks to syntax highlighting and some basic syntax checking.

Ace Edit

Add syntax highlighting and more to the theme and plugin editor.

Luke Alford

Short code implementation of <a href="https://kazzkiq.github.io/CodeFlask.js/" rel="nofollow ugc">Codeflask</a>
Usage
[codeflask language=”langused” title=”title of file or what ever!”]
code goes here
[/codeflask]
You are required to set both these attributes.
Current attributes
language = type of syntax.
title = title of editor.
Demo
You can view it working on wordpress <a href="http://lukealford.me/portfolio/codeflask-for-wordpress/" rel="nofollow ugc">here</a>

Ace Edit vs IDE Micro code-editor