FunContact lets you create a QR code with your contact info, such as name, email, phone number, address, social media, etc. You can even create more than one QR code, maybe one for your work info, and another for your personal contact info. Once you create a QR code, you can then share it with anyone. They simply aim their camera app at your QR code, and they will then see all of your contact details, which they can then save to the contacts on their phone.