All-Inclusive
Validators
HTML and CSS
- MDN HTML Reference
- MDN CSS Reference
- HTML Dog CSS Property Link
- CSS Zen Garden
- CSS Properties Index
- W3C Cascading Style Sheets home page
- CSS-Tricks
- Learn CSS Layout
- {less}
JavaScript
- MDN JavaScript Reference
- JavaScript.com
- JavaScript For Cats
- Online JavaScript Beautifier
- JS Hint
- Embedded JavaScript Templating
- Lodash - A modern JavaScript utility library
- Exploring ES6
- Void Canvas
- Book: The Principles of Object-Oriented JavaScript by Nicholas C. Zakas, ISBN: 978-1-59327-540-2
- Book: Secrets of the JavaScript Ninja, Second Edition, by John Resig, Bear Bibeault, Josip Maras, ISBN-13: 978-1617292859
- Book: Professional JavaScript for Web Developers, Third Edition, Nicholas C. Zakas ISBN-13: 978-1118026694
- Book: Programming with JavaScript: Algorithms and Applications for Desktop and Mobile Browsers ISBN-13: 978-0763780609
- Ajax in 10 Minutes” by Phil Ballard, ISBN 0-672-32868-2