* Four finger swipes on the iPad to go to the task manager or switch between apps.
* Swipe from the left to go back in a navigation controller.
* Swipe from the top to activate the notification center.
* Swipe from the bottom to activate the control center.
* Swipe list elements right or left (but not from the edge) to delete or perform other actions.
* Swipe notifications from the left to perform the default action for that notification.
And then there's 3D touch.