A Sunburst Chart is a multi-level circular chart used to visualize hierarchical data and part-to-whole relationships.

ToastNotification integrates with the Windows Notification Platform and displays notifications similar to native Windows 10/11 system toasts. Even though there is another declined request, I believe that it would value to the suite: https://feedback.telerik.com/wpf/1352632-new-control-toast-notification 

Telerik UI for WinForms have both, TostNotification and DesktopAlert.