Google already has this service if you guys didnt know - Google image search
Click on the small camera icon inside the search box.
EliteCoder Reviewed by EliteCoder on . TinEye - Reverse Image Search http://www.tineye.com/ TinEye is a reverse image search engine. It finds out where an image came from, how it is being used, if modified versions of the image exist, or if there is a higher resolution version. Rating: 5