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

Reminder - A better way to keep track of your reminders 📝

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

Wonder - Your personal research assistant

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.

X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.