Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Alkarta - Find happenings in your city.
TechEvents.co - Tech and startup events aggregator
EcommerceTech.io - Find the Right Shopify Apps to Grow Your Store.
Facebook Local - Discover places to go and events happening near you
Event Finda - Find events near you, and all around the world.