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
Mockupify - Automate your print-on-demand product creation process
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Customily - Design, sell and print personalized products the smart way