Since the launch of TinEye, we have had a great response from the Wikimedia Commons image community. Wikimedia Commons is a repository of free-content files, including images, that are either in the public domain or released under free licenses. These images are used in many of the Wikimedia Foundation’s projects, including Wikipedia.
Anyone can contribute to Wikimedia Commons, and the project is driven by volunteers; while they are careful to respect image copyright, researching the license for each image that is submitted can be a challenge. To aid in this effort, members of Wikimedia Commons have created automated plugins and image checkers driven by the TinEye search engine, to help research photos and locate the source of images.
For an interesting browse, check out Wikimedia Commons member Shizhao’s TinEye bot, which allows you to see all of the interesting images that have been uploaded to the Commons and been detected elsewhere on the web by TinEye.