About a week ago I was starting to work on collecting a bunch of WordPress PHP code that could be consolidated into one post for easy reference, when I ran across an incredible post that already does this. The author WPCandy calls the document a WordPress Help Sheet, and that is exactly what it is.
This document consolidates a large number of PHP code snippets into one PDF file that you can save on your hard drive for future reference, or you can print it out so its available at any time. This document seems like it would be exceptionally useful for theme authors, or anyone that likes to alter existing themes they have downloaded.
Kyle Eslick
Kyle Eslick is the founder and primary author of WordPress Hacks. You can learn more about him at KyleEslick.com or you can follow his personal tweets here.
14 feature in theme looks quite interesting but yet have problem on SEO with some theme of Wordpress. 
Nicen themes, good work :) 
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Thanks for releasing this version. 
As your site has a lot of widgets, so I think it will significantly reduce the server usage. 
Thank you for sharing…