Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Flowlingo - Get fluent in a language through content immersion
Facebook Local - Discover places to go and events happening near you
Eduflow - Digital learning that actually teaches students something
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Padlet - Visual boards for organizing anything.