Javascript Design Patterns
http://www.addyosmani.com/resources/essentialjsdesignpatterns/book/

Understanding ECMAScript 6
https://leanpub.com/understandinges6/read/

Eloquent Javascript
http://eloquentjavascript.net/

You Dont Know JS // Series
https://github.com/getify/You-Dont-Know-JS

Essential JavaScript
https://github.com/ericelliott/essential-javascript-links#essential-javascript-links

JavaScript and JSON with Ray Villalobos
http://www.lynda.com/JavaScript-tutorials/JavaScript-JSON/114901-2.html

JavaScript ES6 Fundamentals
http://code.tutsplus.com/courses/javascript-es6-fundamentals

Exploring ES6
http://exploringjs.com/es6/

Understanding ECMAScript 6

Eloquent Javascript

Javascript Design Patterns