Please find below some websites where you can get high quality photographs released under a Creative Commons license.

• Super Famous
• UnSplash
• Little Visuals
• Compfight
• Flickr Creative Commons

Update: 2015-05-15

• Even more goodies from the fine folks of Design your Way

Update: 2014-12-22

• Pexels the test free photos in one place.

Update: 2015-02-21

• Stock Snap a lot of really good free stock photos, with even more being added every single week.