Fast syntax highlighting for many languages based on GeSHi, the well-established and award-winning PHP highlighter. Simple usage. Valid HTML output.
WP-GeSHi-Highlight is a largely rewritten version of WP-Syntax. Compared to WP-Syntax, WP-GeSHi-Highlight
II) Usage: Bear in mind: don't use the visual post editor. Then, it is very simple. Insert code blocks like this:
<pre lang="languagestring"> CODE </pre>
A short example:
<pre lang="bash"> $ dd if=/dev/zero of=image.ext3 bs=1M count=10000 oflag=append conv=notrunc </pre>
All available options are listed and explained on the plugin's website.
III) How does it look in action?
Examples can be found on the plugin's homepage.