These are links to various add-ons using highlight.js made by other people that I know of. If you notice that a link doesn't contain what it says — please write me about it. And if you want to ask something about certain add-on it's a good idea to write to its author. I can't usually say much about them.

WordPress plugin WordPress plugin by L. Priori with visual theme editor
wp-highlightjs Simple WordPress plugin by Igor Kalnitsky
Drupal module Using highlight.js in Drupal
phpbb 3 mod Mod for [code] .. [/code] blocks in phpbb 3
phpbb 2 mod Mod for phpbb 2
IP.Board mod Mod for Invision Power Board
Firefox extension Firefox extension for highlighting code on sites that don't provide their own highlighting
RoR plugin Plugin for adding highlight.js in Ruby on Rails site
Plugin for Mosquito Plugin for Mosquito blog engine
DokuWiki plugin Plugin for wiki DokuWiki
SMF Code highlighting mod for SMF
MantisBT Plugin for Mantis bug tracker
MaxSite Plugin for MaxSite CMS
MaxSite Another plugin for CMS MaxSite
Node.js module Module for the javascript server node.js
TinyMCE Plugin for TinyMCE
ISP manager Plugin for ISP manager

Made something similar — send the link!