Here is a list of the best free stock photo / royalty free sites on the internet including a free stock photo site with high quality images and complete commercial reuse licenses.

Free Stock Photo Sites:
http://www.morguefile.com/
https://medium.com/
http://picjumbo.com/
http://unsplash.com/
http://join.deathtothestockphoto.com/
http://pixabay.com/