Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Prefer - Professionals you need, from people you know

Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.

Warmspace - Tech-powered conversations that transform relationships in work and life.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Introwise - All-in-one scheduling and business management platform for coaches, tutors and consultants to run their business online.