WP Colored Coding

Under the hood, the plugin used to highlight the code is Rainbow, by Craig Campbell.

Installation:

Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.

Features:

• Supports themes
• Multiple code blocks on the same page
• Code blocks are kept separate from the post
• Code blocks are separately kept in the database

What is new in this release:

• Spanish language files.
• Rainbow support for Go, R, Coffeescript, Java, Smalltalk.

Requirements:

• WordPress 3.3 or higher