Free Open Source Photography
http://www.stockvault.net/index.php
http://www.freeimages.com/index.phtml
http://www.everystockphoto.com
https://unsplash.com/grid
http://www.gratisography.com
http://splitshire.com
http://www.lifeofpix.com
http://superfamous.com
http://picjumbo.com
http://www.imcreator.com/free
http://nos.twnsnd.co
http://getrefe.tumblr.com
http://snapographic.com/photo-category/uncategorized/