EconTracker is an application that allows users to view economic information and data from various sources. The main page allows you to add, delete, and customize web parts. The data page allows you to view cetain time series (most from the Federal Reserve) in more detail. On the data analysis page you can enter data and run regression analysis against it. The calendar page displays links to various economic news items across the web.
You can access the application here.
I used C#, ASP.Net, Ajax, Web Parts, Silverlight, and SQL Server to create this application.