NotifyIcon Control
A WPF implementation for the NotifyIcon component from Windows Forms.
You can instantiate it from XAML, use bindings to set its properties and receive routed events. Also, the context menu is a WPF ContextMenu, so any content can be put into it.
Example:
<av:NotifyIcon Icon="{Binding Icon}" Text="{Binding Title}">
<FrameworkElement.ContextMenu>
<ContextMenu>
<MenuItem Header="Some Text" />
</ContextMenu>
</FrameworkElement.ContextMenu>
</av:NotifyIcon>