Interactive Tutorials, Courses, and Workshops (Free) - nodeschool/sydney GitHub Wiki

HTML Dog - HTML Beginner Tutorial

Code Pupil - Game based learning of HTML & CSS basics

Learn JS - Exercise driven learning of JavaScript basics

Free Code Camp - Learn web development from HTML to NodeJS

Codecademy - Interactive courses on popular languages and technologies

Scrimba - Interactive courses on specific topics and technologies

Millenial JS - Modern but simple web development workshop

Learn TDD - Learn test driven development principles with JavaScript

The introduction to Reactive Programming you've been missing