redcocker

Just another code syntaxhighligher for the theme and plugin editor with CodeMirror. This plugin can highlight sourcecodes in the theme/plugin editor and provide a useful toolbar.
<h4>Features</h4>
<ul>
<li>Highlight sourcecodes in theme and plugin editor on the dashboard.</li>
<li>Based on Marijn Haverbeke’s “<a href="http://codemirror.net/" title="CodeMirrorr" rel="nofollow ugc">CodeMirror</a>” JavaScript library.</li>
<li>Built-in 10 themes.</li>
<li>Useful toolbar which includes search/replace features.</li>
<li>Full-screen editing.</li>
<li>Auto-complete.</li>
<li>Easy to configure features through the setting panel.</li>
<li>Localization: English(Default), 日本語(Japanese, UTF-8).</li>
</ul>
<h4>Support languages</h4>
<ul>
<li>PHP</li>
<li>CSS</li>
<li>Javascript</li>
<li>(X)HTML</li>
</ul>
<h4>Recommended plugin</h4>
<ul>
<li>“<a href="https://wordpress.org/extend/plugins/wp-syntaxhighlighter/" title="WP SyntaxHighlighter" rel="ugc">WP SyntaxHighlighter</a>” can highlight sourcecodes on your front-end(posts, pages, comments).</li>
</ul>

CodeMirror for CodeEditor

Just another code syntaxhighligher for the theme and plugin editor with CodeMirror.

kartikaykanojia

A code syntax highlighter an easy to use source code embedding in wordpress with different(55) themes with 172 languages. 
It uses dynamic script loading to load only essential javascript to render code syntax highliting. 
It uses most powerfull open source library CodeMirror as engine.
Features
<ul>
<li>Dynamic script loading to minimize load time and http call</li>
<li>172 language support</li>
<li>172 shortcodes</li>
<li>Shortcode picker in editor</li>
<li>Lightweight language selector</li>
<li>Multiple Theme support</li>
<li>55 Themes</li>
<li>Theme manager</li>
<li>Theme uploader (Upload your own theme)</li>
<li>Compatible with all WordPress themes</li>
<li>Fast and secure</li>
<li>Cross browser compatible</li>
<li>Line numbering</li>
<li>A powerful, composable language system</li>
<li>Bracket and tag matching</li>
<li>Line selector</li>
<li>Able to resize to fit content</li>
</ul>
Minimum system requirements:
<ul>
<li><a href="https://php.net" rel="nofollow ugc">PHP</a> version 5.2 or higher.</li>
<li><a href="https://www.mysql.com" rel="nofollow ugc">MySQL</a> version 5.0 or higher.</li>
</ul>
Recommended system requirements:
<ul>
<li><a href="https://php.net" rel="nofollow ugc">PHP</a> version 7.0 or higher.</li>
<li><a href="https://www.mysql.com" rel="nofollow ugc">MySQL</a> version 5.6 or higher.</li>
</ul>
Credits
<ul>
<li>The banner of plugin is a copyrighted image created by the <a href="http://www.briskjab.com" rel="nofollow ugc">Briskjab</a>. (C) All rights reserved.</li>
<li><a href="https://codemirror.net/" rel="nofollow ugc">CodeMirror</a> is an open-source project shared under the <a href="https://codemirror.net/LICENSE" rel="nofollow ugc">MIT license</a>.</li>
</ul>

Code Syntax Highlighter

A simple dynamic loading syntax highlighter.Supports 172 languages, 172 shortcodes and 55 themes.

CodeMirror for CodeEditor vs Code Syntax Highlighter