This is a great site for finding quality images to use in your projects. The images can be used for both personal and commercial projects and you don't even need to sign in to download them. The images have been uploaded by users for the public good. Upload your images to help others.
http://ictmagic.wikispaces.com/Photos+%26+Images
You can freely use any image from this website in digital and printed format, for personal and commercial use, without attribution requirement to the original author."