Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Mapiful - Create & order custom printed maps of your favorite places
Facebook Local - Discover places to go and events happening near you
Mapstr - Your places, your world!
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Location History Visualizer - Visualize Google location history data on a heatmap 🗺️