OpenCart is a bit special to me because it is the only open source project I have contributed to, I’ll admit I had help, standing on the shoulders of giants and all that. OpenCart is a free and open source online shop. My contribution PDF Watermarking is for people who sell E-books. My module dynamically adds unique detail to the PDF header and footer. E.G. Name and email address.
This isn’t DRM, people can still copy the PDF onto other devices, as the should be able to, but they can’t necessarily give it to all their friends without looking like a douche.
All I need to do now is write an E-book!