HackerPen - What is HackerPen?
HireBeat - All-in-one career training platform for job seekers
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
InterviewBuddy - Replace fear with confidence
HackerEarth - HackerEarth is the network of top developers across the world. They connect to start-ups, tech companies, organizations and discover the best developer jobs. They participate in programming challenges and compete against other top developers.
interviews.tech - A marketplace for mock interviews and career advice.