dCal is an online scheduling management tool for individuals and groups that's offered free to members of the Duke community. It's easy to use and Web-based, so you can check your schedule from any computer connected to the Internet.
You can use dCal on your own, or use it to schedule time for members of a group or organization. The more people who use dCal, the more powerful the tool becomes.
Learn more about it at http://dcal.duke.edu.