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

Abend - Every party starts with friends. The better FB events app.

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

WebRezPro - WebRezPro offers property management system [PMS] for properties of all types and sizes.

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.

Cloudbeds - Cloudbeds is the platform that powers hospitality, enabling tens of thousands of lodging businesses in more than 150 countries worldwide to grow and thrive.