In my case, I try to animate a ListBox's position to always center the selected entry. So... any kind of EventTrigger of type TargetUpdated and an animation with NotifyOnTargetUpdated will do. Here is my code as an example:

                <ListBox.Triggers>
                    <EventTrigger RoutedEvent="Binding.TargetUpdated">
                        <BeginStoryboard Name="MoveAnimation">
                            <Storyboard>
                                <DoubleAnimation To="{Binding SelectedEpisodeIndex}, NotifyOnTargetUpdated=True}" Storyboard.TargetProperty="RenderTransform.X" Duration="00:00:00.250000" FillBehavior="HoldEnd" IsAdditive="True" IsCumulative="True"/>
                                <DoubleAnimation To="{Binding SelectedEpisodeIndex}, NotifyOnTargetUpdated=True}" Storyboard.TargetProperty="RenderTransform.Y" Duration="00:00:00.250000" FillBehavior="HoldEnd" IsAdditive="True" IsCumulative="True"/>
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </ListBox.Triggers>