Highlight

Highlight is an application created specifically for web programmers and available for various platforms.

It's very easy to use and will allow you to transform your source code into formatted text, applying one of the many different color combinations available.

So, you'll be able to differentiate between the different parts of the web document, making it easier to understand.

Highlight is compatible with more than 100 different programming languages, from the most popular ones to the more obscure ones. It comes in several different languages (including Spanish) and is completely free.