Syntaxtic is a project mainly written in JavaScript, it's free.
Chrome extension for syntax highlighting of source files based on file extension
Easy Install:
https://chrome.google.com/extensions/detail/cgjalgdhmbpaacnnejmodfinclbdgaciDeveloper Install:
git clone http://github.com/matheeeny/Syntaxtic.git
Open chrome extension manager: Window -> Extensions
Click on "Developer mode" to show the "Load unpacked extension..." button
Click "Load unpacked extension..."
Open the 'Syntaxtic' folder you clonedhttp://code.google.com/chrome/extensions/getstarted.html#load