Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
WWDC app for OS X - An app to view and watch WWDC sessions on your Mac
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
Iventlist - Create an app for your event in minutes 🎟️
Ticket Tribe - Sell tickets online with no fees per ticket
WWDC Together - Watch and discuss WWDC together