Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Top Daily Hunts in Slack - A simple, fast way to browse news within Slack
Facebook Local - Discover places to go and events happening near you
SlackScreen - Full screen public Slack channel display
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Boomerang Respondable - Write perfect emails with Artificial Intelligence