This document discusses how 3D printing is enabling indie entrepreneurs through various business models like selling 3D design files, crowdfunding prototypes, retail sales, and apps. It profiles several designers who have found success on 3D printing marketplaces or through licensing deals. While opportunities exist, challenges remain around design copyright, quality control, and business operations support. Resources discussed include 3D printing services, file marketplaces, crowdfunding platforms, and fulfillment services that can help designers focus on design.