Gallery of high resolution free stock photos from gotdotmedia, attribution is required. Currently, the attribution note says you must use the HTML code provided, this causes issues if you dont want to use these images on a non-electronical medium. I  asked gotmedia.com about this and i received the following response.

This gallery is not huge, but the photo all seem to have a large resolution. These images cover a random set of subjects.

You can use the images in any media - however, an attribution link back to www.godotmedia.com would be required.