Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Voodoo Manufacturing - Fast, affordable, high-volume 3D printing
Facebook Local - Discover places to go and events happening near you
Printful Integration with eBay - Sell products on one of the world's leading marketplaces
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Mockupify - Automate your print-on-demand product creation process