Imagery is my favorite image search engine due to the intuitive interface. This has a cool tabbed search interface to browse your searched images. Just keep searching new image terms, which keep compiling in new tabs, click to load full size image at the bottom or in new window. Loads 20-100 images at a time in ajax-y fashion. Best for research and keep collecting all your search images easily. You can tweak preferences to select JPG, GIF or PNG, sort by size, sort by black and white, grayscale or color and of course get safe for work images too. Test