grettke

Out of the box, <a href="https://wordpress.org/extend/plugins/wp-syntax/" rel="ugc">WP-Syntax</a> 
colors code using the default <a href="http://qbnz.com/highlighter/" rel="nofollow ugc">GeSHi</a> colors. 
Per the authors advice in the ‘Advanced Customization’ section of 
<a href="https://wordpress.org/extend/plugins/wp-syntax/other_notes/" rel="ugc">Other Notes</a>, 
you can configure GeSHi yourself by handling the <code>wp_syntax_init_geshi</code> 
hook and configuring it programmatically.
Since I wanted to do just that, I decided to publish a generic plugin 
for folks who wanted to configure GeSHi following this approach.
<h3>Release Notes</h3>
1.2 : Set keyword expansion in the plugin file. Uses Wp-Syntax 0.9, which depends on GeSHi 1.0.7.22.
1.1 : Fixed grammatical errors in the readme.txt. Uses Wp-Syntax 0.9, which depends on GeSHi 1.0.7.22.
1.0 : First public release. Uses Wp-Syntax 0.9, which depends on GeSHi 1.0.7.22.

wp-syntax-rettke

wp-syntax-rettke serves as an example for the programmatic 
"Advanced Configuration" of GeSHi in Ryan McGeary's excellent WP-Syntax plu …

Jared Harbour

Josh Lyford

Prettify is a WordPress plugin that automatically embeds the required javascript for Google Code Prettify. It also includes a preview of what your code will look like and the ability to customize the look by installing <a href="https://wordpress.org/extend/plugins/themekit/" rel="ugc">ThemeKit For WordPress</a>. ThemeKit For WordPress is also on WordPress.org.
If you prefer you can run the plugin without ThemeKit and it will just use the default Prettify styles.
Features include:
<ul>
<li>ThemeKit ready.</li>
<li>Easy to use syntax and styling. </li>
<li>Same syntax highlighter as <a href="http://css-tricks.com" rel="nofollow ugc">css-tricks.com</a>.</li>
</ul>

Prettify For WordPress

Easily add Google Code Prettify to your WordPress site. Customize the coloring with easy with options powered by ThemeKit For WordPress.

wp-syntax-rettke vs Prettify For WordPress