TinEye is a cool reverse image search engine. It lets you take an image and search for it on the web, even finding uncropped, expanded, or unwatermarked versions of the image. Sadly, while TinEye provides plugins for both Firefox and Chrome, they don’t provide one for Safari. Because of this, I have written my own extension. Just install it, then right-click on any image and you should see “Search Image on TinEye”. You can get it here.