TechEvents.co - Tech and startup events aggregator
Event Hunt - Startups and Tech Events Curated By Locals
Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.
Eventil - Product Hunt for tech events
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Konflist - Curated list of tech conferences all around the world!