FREE IMAGES – Public Domain Photographs and Graphics you may be able to use in your projects. It is always better to take your own photographs for professional work.
http://www.dreamstime.com/free-images_pg1
http://www.freedigitalphotos.net/
http://www.publicdomainpictures.net/
http://www.ancestryimages.com/
http://join.deathtothestockphoto.com/
http://blog.hubspot.com/marketing/75-free-stock-photos-im-ht
http://www.istockphoto.com/search/lightbox/13454712#1499d1d2
http://commons.wikimedia.org/wiki/Main_page
http://www.everystockphoto.com/