If you are tired of taking Google Images potluck when you search for photos, you might try Solate.tk where high resolution, hand-picked images from Flickr's library of Creative Commons-licensed images are all in one place. You can use a search box or check out their categories if you are just browsing. Always give credit to the owners of the images you use.
"The digital shift has been hard on photographers."
"If you go to the Getty Images website, you see millions of images. [All of them used to be] watermarked. There are more than a hundred years of photography here, from FDR on the campaign trail to the Oscars, all [formerly] stamped with the same transparent square placard reminding you that you don't own the rights. If you want[ed] Getty to take off the watermark, you [had] to pay for it.
Starting now, that's going to change. Getty Images is dropping the watermark for the bulk of its collection, in exchange for an open-embed program that will let users drop in any image they want, as long as the service gets to append a footer at the bottom of the picture with a credit and link to the licensing page." (Read full article on theverge.com)
The Library of Congress recently released to Flickr Commons more than 1,600 color photos taken during the final years of the Great Depression. Funded by the Farm Security Administration and the Office of War Information, the pictures were taken by several famous photographers, including Jack Delano, Russell Lee, and Marjory Collins. With their unique, vibrant look at the past, they offer a fresh perspective on one of the darkest periods in American history.... Daily Finance, Aug. 21