Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
All Design Conferences - A list of all front-end and design conferences
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
TechEvents.co - Tech and startup events aggregator
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
Konflist - Curated list of tech conferences all around the world!