A site where you have thousands of photos at your disposal. Some may not be under CC license, but you will find some which are.

The World Images Kiosk, hosted by San Jose State University, offers more than 75,000 images that teachers and students can use in their academic projects. All of the images can be used under a Creative Commons license that requires you to give proper attribution when necessary. You can find images by using the search box or you can browse through more than 800 portfolios and groups organized by subject.

ImageBase is a personal project of professional photographer David Niblack. ImageBase contains more than one hundred pages of images that Mr. Niblack has released for free reuse and redistribution. In fact, the top of the ImageBase site says "treat like public domain." In addition to the hundreds of images that are available, ImageBase also offers nearly one hundred free PowerPoint templates.

All photos on Pexels are licensed under the Creative Commons Zero (CC0) license. This means you can copy, modify, distribute and perform the photos. The pictures are free for personal and even for commercial use. All of them without asking for permission or setting a link to the source. So that attribution is not required. All in all the photos are completely free to be used for any legal purpose.

500px allows users to use Creative Commons licenses. Great photos offered from a variety of CC licenses to fit every purpose.

Pics4Learning is a safe, free image library for education. Teachers and students can use the copyright-friendly photos and images for classrooms, multimedia projects, web sites, videos, portfolios, or any other project in an educational setting. Photographers from around the world donate images to this collection. While the photographers retain the rights to these photos, they have graciously allowed their use through this collection.

Urbandirty offers original city photo patterns for any use, free of charge, under CC license. All they ask is to reference the site when you use a photo.

The site provides with photos and videos all free of charge and under CC license by attribution which means that you are free to use any photo provided you give reference to the site.

FREE-handpicked-stockphotos for your commercial and personal works. All available hi-res/hi-quality pictures you can use on personal and commercial projects. The images are under CC license by attribution which means that you are free to use any photo provided you give reference to the site.

Free images and videos under Creative Commons CC0.

A repository of public domain images uploaded by amateur photographers, you must register to download the photos.

A site with many free pictures taken by photographers and graphic artists used with an account that you create for free.