- JavaScript - MDN
- Node.js Manual & Documentation
- Awesome Node.js – A curated list of delightful Node.js packages and resources.
- Annonated ES5
- ECMA-262's current work (next ECMAScript edition's draft)
- ES Discuss
- Speaking JavaScript: An In-Depth Guide for Programmers - Dr. Axel Rauschmayer
- Exploring ES6: Upgrade to the next version of JavaScript - Dr. Axel Rauschmayer
- You Don't Know JS (book series) - Kyle Simpson
- Stream Handbook for Node.js - James Halliday
(I'm only adding 100% freely accessible resources for now, so no paid books)
- Named function expressions demystified - Juriy "kangax" Zaytsev
– explains not only NFEs, but Function expressions vs. Function declarations very well too.
- Immediately-Invoked Function Expression (IIFE) - Ben Alman
- Understanding JavaScript’s this keyword - Angus Croll
- What is the Execution Context & Stack in JavaScript? - David Shariff
- JavaScript Promises: There and back again - Jake Archibald
- We have a problem with promises - Nolan Lawson
- Idiomatic.js - Principles of Writing Consistent, Idiomatic JavaScript
- JavaScript Callbacks are Pretty Okay - Andrew Kelley
- An Important Pair of Parens - Peter Michaux
- gulp - The vision, history, and future of the project - Eric Schoffstall
- Web Starter Kit
- Javascript quiz - Juriy "kangax" Zaytsev
- So, you think you know JavaScript? - Dmitry Baranovskiy
- Javascript quiz. ES6 edition. - Juriy "kangax" Zaytsev