After some research this morning I have found Text Wrangler from Bare Bones Software.
It is the "little brother to BBEdit". It is free and available from the App Store.
More information can be found at: http://www.barebones.com/products/textwrangler/
Thank you for writing such an informative book that is easy to understand. Can't wait to get more into it to get a better understanding of CSS and How they make coding web pages easier.