Free to Use Open Images from Creative Commons
From Creative Commons CEO Ryan Merkley, 'the largest museum in the United States has eliminated the barriers that would otherwise prohibit access to its content, and invited the world to use, remix, and share their public domain collections widely and without restriction.' ”
CC Image SearchAdditionally, CC has a new Image Search engine available in Beta - search the Met's images, along with other creative commons licensed images, to find an open image.
CC Search Prototype