Getty Images just made their 35 million images free for non-commercial use, to fight copy-right infringement. The new embed feature will allow any to embed images from Getty Images, without any ugly watermark on them. However these images will have links to original licensing page.
Read the article on British Journal of Photography.
http://www.bjp-online.com/2014/03/getty-images-makes-35-million-images-free-in-fight-against-copyright-infringement/