This site makes it easy to create images merged with QR codes. It's great for creating stylish interactive logos or add QR links or info to photos. Just choose an image, enter the QR code details, drag into place and download the result.
http://ictmagic.wikispaces.com/ICT+%26+Web+Tools
This site lets you easily create QR codes with various foreground and background colors. You can insert images behind, on top of, or embedded into your QR code.
"A superb online whiteboard suite of tools, including a random name picker, classroom sound level indicator, display a QR code, drawing and text tools, traffic lights, timers, clocks and dates, and even a fab exit poll tool. You can even change the background, including your own images to display extra resource information, or use your computer camera to show live video like a visualiser."