Dropbox is a great Internet file storage site that provides 2 GB of free storage and has mobile apps for several different platforms. Another way in which Dropbox is useful is through integration with applications. App integration is particularly useful on the iPad because it does not have a file manager to provide a way to work with files on the device. Dropbox is providing a handy application catalog that lists all of the applications that have built-in support for Dropbox, and the catalog is organized by mobile platforms. For example, can see that there are nine Android apps that work Dropbox while there are 38 iPhone apps. Most of these apps enhance the value of Dropbox by using it for storing files or for online backup of data.