HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Code4Startup - Learn Ruby on Rails, Python, AngularJS, NodeJS, React, Ionic by cloning AirBnb , TaskRabbit, Tinder, Product Hunt, Fiverr and . more.
AlgoExpert.io - A better way to prep for tech interviews
Code-Free Startup - Learn how to build real apps without coding
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
GoSkills - GoSkills offers bite-sized business courses.