I ported my Google Cardboard app, V1RTUAL REALM VR for Cardboard, over to the Oculus Rift and added Leap Motion support with the Hovercast UI. You can check this video out in 3D using a 3D viewer like Google Cardboard or the New 3DS.
You can check out the mobile version of 1.0 (basically a free tech demo) on Android using Google Cardboard or other mobile HMD: https://play.google.com/store/apps/details?id=com.V1RSoftware.V1RTUALREALM