TinEye is a powerful image search and recognition engine that can help to find where an image came from and how it's being used. It uses a reverse image search where unique digital signatures are created for each submitted image and then compared to other indexed images to...
The most comprehensive image search on the web.
Google Images is a search service created by Google that allows users to search the Web for image content. The keywords for the image search are based on the filename of the image, the link text pointing to the image, and text ad.
SauceNAO is a reverse image search engine. The name 'SauceNAO' is derived from a slang form of "Need to know the source of this Now!" which has found common usage on image boards and other similar sites.
Search by Image is a Firefox extension which enables you to initiate a reverse image search from the right-click context menu or the browser toolbar, and comes with support for more than 30 search engines.
Amusing pictures, wallpaper for your desktop, diagrams and illustrated instructions, answers to your image questions, search by image or photo
Uses real facial recognition algorithms to compare a submitted photo with images of about 10 million people. The database obviously contains many freely available images from the Web, including Wikipedia.