One Month HTML - Learn HTML in 30 days
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.
Grav - The modern open source flat-file CMS
Google's Python Class - Assorted educational materials provided by Google.
Elementor - Elementor is a front-end drag & drop page builder for WordPress.
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.