GeSHI is one of best and easiest to use code syntax highlighters around. Written in PHP this class makes creating color coded code for display on a webpage a snap. Handling over 50 code languages this package is not only complete but in constant development.

For demo purposes I threw together a website to demo what it does called Quick Highlighter. This site will get better as soon as I find some time to build this into more of a webservice.

Quick Highlighter:
http://quickhighlighter.com/

The code:
http://qbnz.com/highlighter/

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