Real Dev - Real-life coding skill challenge
Takehome - Effective and humane coding challenges for candidates
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
hackattic - No nonsense, real world programming challenges
omniquotient - Assess and grow your knowledge as a developer
Lytmus - Lytmus automates technical recruiting.