urlimg.com is an image processing and storage service with a URL-based API. It's intended use is on sites where modified versions of images need to be generated and updated. Suppose that you are creating a website which sells various items and need to generate thumbnails for each of them. Instead of having to buy, install and use a program like Photoshop, you can use urlimg.com to generate, update and host the thumbnails. In addition to making thumbnails, there are commands for doing other image transformations such as squaring, cropping, resizing and rotating. These commands can also be combined together to do more complex image transformations.