Quick Response or QR codes are now gaining popularity with QR scanners available for cameras, mobile phones, smartphones etc. You can have QR Codes for URLs, addresses, phone numbers etc. QRCore is a simple free web app which allows you to easily generate QR Codes for any data. You can enter any data for generating the QRCode and also specify the size of the image.
QR Core will allow you to create QR codes for names, urls, phone numbers, email addresses or plain text. Once you have generated it, you can download the image, get the link to the image or even embed it.