YPrintIt is a free app that lets you design and send digital business cards using QR codes. The app offers hundreds of templates.
To give someone your business card, you show them the QR code that is generated when you create the e-card, and they take a photo of it with the QR code reader. If they don’t have the app, they can take a regular picture on their cellphone and view it once they install it.
The virtual business card can be sent an unlimited amount of times, and with real time data sync too, so every time you change your information your contacts will receive an update about it. Also, if your contact shares that card with someone else, you can log into your account online and see has received it.