Real Dev - Real-life coding skill challenge
Product Management Exercises - A repository of product manager job interview exercises
hackattic - No nonsense, real world programming challenges
Pathrise - Career coaching for students, free until you get a job 🎉
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.