Google's Python Class - Assorted educational materials provided by Google.
CSS-Tricks - CSS-Tricks is a website about websites.
Learn Python The Hard Way - One of the best guides to learn Python & coding in general
The Little Book on CoffeeScript - "The Little Book on CoffeeScript" is a short (62 page) book that shows developers how to build web applications with CoffeeScript.
Think Python - Learning Resources
Flexbox Froggy - A game for learning CSS flexbox