These sample applications are not anything you haven't seen before. The cool thing is that these were built in only a few minutes each, and can be customized as easily.
Simple CRUD applications:
More advanced example querying SQL Server dictionary to document the database structure:
DB Design Documents
Applications metadata in XML:
Localised address book:
Because these applications are built on top of a standard and robust technologie stack (Microsoft .NET Framework and SQL Server), they can be hosted anywhere and scale to thousands of records and hundreds of users.
4.1
Address book
To do
Bookmarks
Memo pad
Photo album
Wine cellar
Restaurants
Database