Tribe of Mentors - Short life advice from the best in the world, by Tim Ferriss
Workshop - Learn new skills simply by doing them.
MentorCruise - Personalized mentorship experiences
ChalkStreet - Become a 'Better' you. Learn something new everyday.
Frontend Mentor - Supercharge your front-end skills by building in a real-life workflow. Solve real-world HTML, CSS and JavaScript challenges whilst working to professional quality designs.
Graam - Host private lessons, meet interesting people & make money.