Xcavator is a cool new Visual Search Engine for Images of very excellent quality. Thanks to this wonderful service which allows to find images that are really beautiful. It is much more useful than the classic search engines since it searches using meta data such as the categories of the images through Tag.
One particular interesting feature is the search based on color, it has a very useful comfortable widget with which you will be able to select the exact color which you have in your mind. This is a cool online tool that emphazises that a photo has much to express!!