I often recommend Flkr as a location for free Creative Commons images.
Unfortunately, just because the person uploading the image has listed it as Creative Commons always doesn’t mean that it is. Sometimes they are re-posting an image they have found elsewhere.
It’s usually fairly easy to tell if an album is a collection of favourite downloaded images, as opposed to the ‘best of’ snaps from a holiday. But sometimes it’s not so clear. If you are planning to use any downloaded images outside the password protected university environment then you should bookmark Tineye.
TinEye is a reverse image search engine. You can submit an image to TinEye to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.
TinEye is the first image search engine on the web to use image identification technology rather than keywords, metadata or watermarks. It is free to use for non-commercial searching.
TinEye regularly crawls the web for new images, and we also accept contributions of complete online image collections. To date, TinEye has indexed 11,015,187,850 images from the web to help you find what you’re looking for.
For tablet and smart phone users there is an Android version of Tineye in Beta testing. For and a iPad/iPhone users there is an app called Veracity