Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Cat Street View - Explore Japan... as a cat.
Facebook Local - Discover places to go and events happening near you
Hivemapper - Build maps that reveal changes 🌏
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Street View Ready - Contribute to Google Street View with your own hardware