Pluralsight - Pluralsight is a learning management system (LMS) that helps aspiring tech professionals learn the basics of the trade and lets established professionals expand their skill sets.
KeywordTool.io - KeywordTool.io is the best FREE alternative to Google Keyword Planner and Ubersuggest. It uses Google's autocomplete feature to get over 750+ long-tail keywords for any given query.
Bloc.io - Learn to code and become a web developer in Ruby on Rails, HTML, CSS, Javascript, and jQuery in Bloc's Intense Online Web Development Apprenticeship.
Google Trends - Explore Google trending search topics with Google Trends.
Linux Foundation Training - Linux Foundation Training is a complete web-based platform that offers you advanced-level and updated courses and tutorials to learn the developing and programming skills.
Keywords Everywhere - Free browser add-on for keyword volume, CPC & competition