Magento is an open source e-commerce platform. It can be used as an online shop for selling personalized products and designs using ZetaPrints web-to-print and image generation API. The extension syncs the data between the two apps in a way that all processes are hosted within Magento interface, even if they are executed by ZetaPrints.
This extension can be installed manually or as a package from Magento website. Either way you need to follow some steps and configure it properly. See links on the right for more info and download locations.
Technical support is available from firstname.lastname@example.org