KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
Hackr.io - There are tons of online programming courses and tutorials, but it's never easy to find the best one. Try Hackr.io to find the best online courses submitted & voted by the programming community.
CheatKeys - View Windows keyboard shortcuts in the current application.
Google's Python Class - Assorted educational materials provided by Google.
cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.
A Byte of Python - A Byte of Python is a Python programming tutorial and learning book that teaches you how to program with the Python programming language.