Event Hunt - Startups and Tech Events Curated By Locals
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Iventlist - Create an app for your event in minutes 🎟️
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Zoho Backstage - Plan, run, and analyze your event— all from one place
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.