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.
1up Events - Corporate events as a service
Padlet - Visual boards for organizing anything.
Facebook Local - Discover places to go and events happening near you
Simple Poll - The easiest way to create polls in Slack
EventsApp - A simple concise app for creating and sharing events.