Huntathon - Browse and submit Product Hunt Global Hackathon projects
Hackathon Match - Find collaborators for the Product Hunt Global Hackathon
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Project Board - Team up with a co-hacker for your project
CoFoundersLab - Meet 250,000+ entrepreneurs online
Challenge Hunt - Explore coding contests, hackathons from around the world