Minter.io - Instagram Analytics. Twtitter Analytics. Facebook Analytics

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

Instagram Analytics by Socialinsider - Get better at Instagram marketing by studying competition

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

HypeAuditor - All-in-one Influencer Marketing Platform

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.