Tribe of Mentors - Short life advice from the best in the world, by Tim Ferriss
hackattic - No nonsense, real world programming challenges
LEADx - Coaching for next-gen leaders
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Mentory - On demand career mentors to succeed at work.
Takehome - Effective and humane coding challenges for candidates