Reverse Image Search

TinEye let’s you search for images with that same image. It may sound stupid but it’s actually pretty useful in some instances. It’s true usefulness comes when you see an interesting image and wonder what it is, and where it originates from. It’s also great if you posted an image online that you own the rights to and you want to see if anyone is using it without your permission.

The website is http://www.tineye.com/.