An Image Tool is only as good as the images that it makes available. No number of features make up for a scanty collection of images. It is important to remember that the choice of Image Tool doesn't have to limit the images that you may access. A growing number of Image Tools support simultaneous access to multiple repositories. The publishers of digital content also recognize the benefit of providing access for multiple applications. Increasingly they are making available APIs or publishing O.K.I. Repository OSID implementations to let a variety of tools access their content.