Voodoo Manufacturing - Fast, affordable, high-volume 3D printing
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Printful Integration with eBay - Sell products on one of the world's leading marketplaces
Project Fixup - Meet people, not profiles
Mockupify - Automate your print-on-demand product creation process
Palaround - Meet people you should be friends with.