Sourcing Images licensed by Creative Commons - Simple CC Flickr Search
This tool is created by John Johnston and works great on mobile devices too. Just go to the URL: http://johnjohnston.info/fcc/
Then add in your search term and find images that are licensed to be used through Creative Commons. Click GO and then find an image. Once you click on image, you can choose what size image you want and click STAMP. It will provide you with a download of the image with the creators information "stamped" onto the image. A great tool to help students and teachers in sourcing images easily.