(http://worldimages.sjsu.edu)
This website provides approximately 100,000 historical collection images. This website give you access to the California State University Images Project. To download the image, you can just drag it to your desktop. You can browse through the collection in a very easy and friendly manner. They are hierarchically organized, first from continents, then by chronological grouping, and lastly by country and century materials. The images are copyright free. College students can use this website for their research paper. Even though the images are free to use, it is encouraged to give credit to the copyright holders.

http://www.imageafter.com/

The name of the site is Image*After. This site provides a variety of images that are free to download and use for commercial or personal work. The photos are in high resolution and are provided in jpg or jped format. In addition, the images are in a raw material allowing users to edit it to their need. The site provides two directories; one, an image directory that allows users to make their selection of the image based on objects, places, animals, plants, etc; and two, a texture directory that allows the users to select the type of texture. The texture directory includes metals, floors, skin, wood, rock, walls etc. These photos are copyright free. You can modify the images and textures, use the images and texture in your own work and you can redistribute or sell the images and texture. However, you cannot redistribute the images and textures as part of an online recourse website. Mainly, high school or college students that are interested in graphic design or internal design would benefit from this site.

http://www.pdclipart.org/
Public Domain Clip Art is a photo repository with over 25,000 images. The photos are categorized into groups according to the topic and an indication of how many photos are available is shown next to the topic. This site provides a variety of images that are free to download and use for commercial or personal work. These photos are copyright free. The audience that would benefit from this site would be kids of all ages for any subject.