The Pure Creative Commons website features stock photography that requires no initial or usage fees.  Populated with relevant topics, these stock photographs are available in high (print quality), medium res (900 pixel jpeg) and web res (300 pixel jpegs).  All of the digital images found on the site are available and free to use even for commercial applications.  

Pure Creative Commons, LLC is a privately held stock photography company in Columbus, Ohio.  Pure Creative Commons  provides reliable, 100% free stock photographs that can be shared, copied, distributed, modified or adapted, even for commercial use, without any copyright violations.    purecreativecommons.com