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Flickr is a website for storing and displaying digital imagery though it is mostly geared to photography. You can create sets of your own imagery or collect other photographer's photos in galleries. Has many other uses as well. Too numerous to list here.

The account holder holds the control of this tool. A user doesn't have to download documents to the computer to view them. It has ways to plan ahead through task management, group calendars and a birds eye view of a timeline. It has a discussion board. Information can be share easily.