QLHilight
Update: This is probably a better thing to use. I haven’t tried it. http://code.google.com/p/qlcolorcode/
QuickLook plugin that syntax-highlights several types of source code.
The default QuickLook generator for text also processes source code. It simply displays the text, without knowing what kind of code it is. This is less than ideal. QLHilight recognizes, highlights, and displays several types of source code.
It supports C, C++, Objective-C, CSS, PHP, Ruby, Python, JavaScript, Java. Alex Gorbatchev’s dp.SyntaxHighlighter does all the hard work.
My code is dual-licensed GPLv2 or BSD, at your option. dp.SyntaxHighlighter is LGPL.