Websites
w3school, freecodecamp, studytonight, javascriptinfo, developer.mozila, codecademy, Javascript.com css-tricks.com

Apps
SoloLearn, Mimo, Programming Hub, Programming Hero, Khan Academy, Learn Web development, Grasshopper.

Blogs
daily.js, slashDot, Hackernews, Web Designer weekly, sidebar.io, HTML5 weekly, poneyfoo.com, tdlr.tech, smashingmagazine.com .

Courses
Udemy, freecodecamp, edx.org, Coursera, Scaler, CodingNinjas, Udacity.

E-book
b-ok .asia

Online Code Editors
codepen.io, stackblitz.com, codesandbox.io, codeshare.io .

Q&A Sites
Stackoverflow, Github Discussion, reddit, Medium, Quora, Code Project.