Quick Code - Curated list of free online programming courses

Courseroot - Biggest online course database on the web

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.

Airschool - Airschool is a live-streaming educational platform with engagement and monetization tools to help anyone start teaching online. It can be finance, business, wellness, meditation, branding, marketing; in short, anything you want!

golang.dk - Online courses that are better than books and faster than video.

Alcamy - Free, open self-learning platform. Learn & teach anything.