Syntax Highlighters

I've done some looking around for syntax highlighters that I remember using and / or hearing of.

I hunted down GeSHi, which is made in PHP. And Enscript, which is a command line program ( More info about Enscript here ).

Both have the ability to highlight multiple languages. I'm looking for more programs like this.

So if anyone knows of others, feel free to leave a comment and I'll check it out.

Once I pick one, I plan on finishing a Drupal module that makes use of the highlighter and releasing it.