CoFoundersLab - Meet 250,000+ entrepreneurs online
Tribe of Mentors - Short life advice from the best in the world, by Tim Ferriss
Huntathon - Browse and submit Product Hunt Global Hackathon projects
MentorCruise - Personalized mentorship experiences
Founders Nation - Find or become a startup cofounder
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.