A simple business card design featuring a large QR code that I put together for my Etsy store. Completely designed in Adobe Illustrator, this card design remains one of my personal favorites. You can purchase the design here, if you really want to. It's available as a Photoshop template and an Illustrator template.
The card also has a note section on the back for extra information you may want or need to add after printing.
Unfortunately, you do have to have some sort of knowledge about design software to replace the QR code. D: If you can get past that, this card is for you. Haha!