Founders Nation - Find or become a startup cofounder
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
CoFoundersLab - Meet 250,000+ entrepreneurs online
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Findnlink - Find people to work with on your ideas.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.