https://egghead.io/
https://www.udacity.com/
https://www.udemy.com/
https://www.khanacademy.org/
https://www.coursera.org/
https://www.codecademy.com/learn/all
https://linuxacademy.com/cp/
https://www.safaribooksonline.com/
https://developers.braintreepayments.com/
http://stackshare.io/trending/tools
http://nightwatchjs.org/
http://www.amazon.com/Code-Language-Computer-Hardware-Software/dp/0735611319