Bookmarks are the currency of the web. We use them to remember and return to web sites we visit on the Internet. Vi.sualize.us is a similar idea, except it helps you catalog and remember and share images you find on the web.
Using the vi.sualize.us bookmarklet, you can invoke the tool on any page. Once invoked you are presented with a toolbar at the top of your browser that allows you to click on specific images on a web page and add them to your vi.sualize.us collection. As you select images you are prompted to note source of the image and can add additional information that you want to remember along with the image. In addition, you can also add tags that help you categorize the images you save. All in all, a nice tool to remember and catalog web images.