A couple of repository’s for free stock photos

A new tool for developers

http://pixabay.com/

Finding free images of high quality is a tedious task - due to copyright issues, attribution requirements, or simply the lack of quality.  Pixabay - a repository for stunning public domain pictures. Your source for free vectors, free drawings and free photos. You can use any Pixabay image without attribution in digital and printed form, even for commercial applications.

And let's not forget morgueFile

http://www.morguefile.com/

Looking for high resolution stock photos for your illustration, comp or design needs? Search morgueFile for free reference images. Yes, they're all completely free. whether you're an illustrator, art director, instructor or looking to add a defining visual to a presentation.