Online learning platforms

https://www.codeschool.com/courses
- Ruby
- JS
- HTML/CSS
- iOS games build

http://www.codecademy.com/
→ JavaScript
→ HTML/CSS
→ PHP
→ Python
→ Ruby
→ APIs

https://www.learnstreet.com/lessons/languages/
- HTML
- CSS
- JavaScript
- PythonRuby

https://www.udacity.com/courses#!/All
- Web Development
- HTML5
- Python
- Java
- Computer Science
- Algorithm
- AI

https://www.khanacademy.org/library
- Programming Basics
- Canvas Drawing
- Animation
- User Interaction

http://sqlzoo.net/wiki/Main_Page
- SQL Server
- Oracle
- MySQL
- DB2
- PostgreSQL

http://www.codewars.com/
- JavaScript
- CoffeeScript
- Ruby

http://www.codeavengers.com/
- JavaScript
- HTML5/CSS

http://www.crunchzilla.com
- JavaScript

http://codecombat.com/
- JavaScript

http://www.freecodecamp.com/
- HTML5
- CSS3
- JavaScript
- Databases
- Git & GitHub
- Node.js
- React.js
- D3.js