TinEye is a reverse image search engine. It finds out where an image came from, how it is being used, if modified versions of the image exist, or if there is a higher resolution version.
"Image*After is a large online free photo collection. You can download and use any image or texture from our site and use it in your own work, either personal or commercial. "
"welcome to everystockphoto.com
We are a search engine for free photos. These come from many sources and are license-specific. You can view a photo's license by clicking on the license icon, below and left of photos."
"Photogen: quality, high-res FREE stock photos and images
Still paying for your stock photos and images? Forget royalty-free - Photogen images are totally-FREE! Registered users can download and use Photogen stock photos FREE, both for commercial and personal projects.
The Photogen FREE photo gallery is regularly updated with new quality, high-resolution free photos and images. To download you'll need to sign up first, and once you've signed up you can also download multiple images in a ZIP file by using our handy lightbox function."
"Download these free images and many more!
There is no charge for any of the royalty free images on this website, use them how ever you like.
Enjoy the free images!"
"Welcome to our free, royalty free stock photography collection of over 1000 images and growing! You'll find stock photos covering a range of categories such as textures, animals, technology, water, fire, jobs and careers, buildings and more. These stock photos are 100% free and are also royalty free. We just ask that you don't redistribute them, or use them with anything that could be viewed as offensive (hate / pornography) ;) Do you like what you see? We would love it if you would spread the word and let others in on this free collection. Blog, Tweet, Follow below, or do whatever to spread the word on this free stock photography collection. "
"RGBStock.com has a wide range of high quality stock photos. Browse through the site and the wonderful galleries containing photos and illustrations from artists all over the world who want to share their work for free. Or start uploading stock images yourself. The best thing is it's absolutely free!"
"Stock.XCHNG is under new management! Getty Images is proud to now wholly-own the world's best free stock site. SXC has a long history and a great community, and we're excited to grow with this unique site. We also have lots of expertise and experience to offer as industry leaders. "