Beastnotes - A notebook for online courses
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.
Lekh - Your digital notebook for more interactive note-taking
Google's Python Class - Assorted educational materials provided by Google.
Bookblock - Design-led custom notebooks & stationery.
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.