John

This plugin enables you to highlight syntax using the PEAR Text_Highlighter class. Other syntax highlighters that use GeSHi have slower rendering speeds which will increase your page load time. However, this plugin gives you the speed and efficiency provided by the PEAR developers. You even have the option of enabling or disabling the line numbers as well as specifying your own style.

Ion Snytax Highlighter

This plugin allows users to highlight code.

Cuamckuy

Tired to search for normal, easy to install programming code highlight plugin?
This one will help you to end this adventure.
It adds special shortcode [code][/code], keyboard shortcut «alt+c» and button to Visual Editor.
If you want do define highlight syntax language, you may use direct lang param like [code php][/code].
Plugin will also highlight <code><pre class='language-html'>…</pre></code> and <code><code class='language-html'></code></code>, if you don’t want to use shortcode.

Easy Prism Syntax Highlighter

Highlight programming code with Prism.JS script easily.

Ion Snytax Highlighter vs Easy Prism Syntax Highlighter