Here is an XBAP demo of Xceed DataGrid for WPF, a completely free datagrid control for Windows Presentation Foundation. This control is provided entirely for free, yet is completely functional and includes full distribution rights. It is 100% stylable and templatable, and features rich in-place editing, powerful grouping with UI virtualization, and high-quality views (table and card), each with all the OS themes. Demo requires XP with .NET 3.0, or Vista.