Zend’s PHP 101 course (http://devzone.zend.com/article/627)
Learn Word Press
WordPress Codex – A manual in wiki form found on http://codex.wordpress.org to understand wordpress code
Template tags (http://codex.wordpress.org/Template_Tags). Consult it whenever you need to do something out of the ordinary within your themes or when you want to alter things in an existing theme. Each template tag is described, along with usage and sample code to help you understand it.
Function reference (http://codex.wordpress.org/Function_Reference)
WPBeginner – Beginner’s Guide for WordPress
WPBeginner is the largest WordPress resource site for WordPress Beginners with easy to understand WordPress tutorials for mastering the basics and beyond
Learn Python Programming
CodeSkulptor A great tool that was built by Scott Rixner and it runs Python programs in your browser. CodeSkulptor runs in Chrome 18+, Firefox 11+, and Safari 6+. Some features may work in other browsers, but do not expect full functionality. It does NOT run in Internet Explorer.