Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
GetYourGuide - Get tickets to the most popular attractions while travelling
Event Hunt - Startups and Tech Events Curated By Locals
Airbnb Experiences - Airbnb expands beyond rentals — now hosting Experiences
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Viator - Tours, things to do, sightseeing tours, day trips and more from Viator.