It's a datagrid with asynchronous data virtualization and modern smooth scrolling mechanics.
Xceed DataGrid for WPF features rich in-place editing with a full complement of flexible, themed, and themable editor controls for all kinds of data types. Provides all the mouse and keyboard interactivity necessary for efficient data entry.
Rich printing allows for easy report creation, and exporting lets Excel lovers access the data in that tool if needed. Flexible filtering and powerful sorting capabilities let users find and visualize data quickly, and persist/restore features let them keep their setups.