Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
minipoll - Create simple shareable polls in seconds
Event Hunt - Startups and Tech Events Curated By Locals
Simple Poll - The easiest way to create polls in Slack
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Polls.io - Create simple polls in seconds