Sometimes you might come across a photo on a website and want to find the original version to see if it’s public domain or ask the original artist if you can use it. Tineye is a great service that let’s you do just that. You can upload any picture you’ve grabbed from a website to Tin Eye and it will find all the places that exact picture appears on the web. You can then sort by biggest image, and look for what might be the original place it came from.
There’s a safari plugin that will do this from Safari – go to the Safari menu then ‘Safari Extensions Gallery’ and search for Tineye and install the plugin. Then just right click on the image from any webpage to search in Tineye.