Huntathon - Browse and submit Product Hunt Global Hackathon projects
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
CoFoundersLab - Meet 250,000+ entrepreneurs online
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Hackathon Match - Find collaborators for the Product Hunt Global Hackathon
pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features