Src Img is a bookmarklet that interfaces with Google™ Image Search to help you find the creators of images you see on blogs that are too lame cool for attribution.
How do I use it?

Drag the following link to the bookmarks bar in your browser.
?¿ src-img

Then click it when you are on a page with images you want to track down.

Quix is an extensible bookmarklet, that allows you to easily access all your bookmarks and bookmarklets, across all your browsers, while maintaining them in only one spot. All you have to do is remember the shortcut for the bookmarklet, so, basically, it’s like a command line for your browser!