HackerPen - What is HackerPen?
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
EmployBlue - Custom pre-employment testing software. Optimizing your hiring efficiency.
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.
InterviewBit - Learn and Practice on almost all coding interview questions asked historically and get referred to the best tech companies
Coding View - Coding View is live collaborative coding environmentdesigned for technical phone interviews. It features web version of Visual Studio Code, as well as access to real terminal. It has a built-in compiler for most popular programming languages.