Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Event Hunt - Startups and Tech Events Curated By Locals
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Iventlist - Create an app for your event in minutes 🎟️
Bigtent - BigTent is a web-based organization and communication portal for groups.
Zoho Backstage - Plan, run, and analyze your event— all from one place