Common Craft provides some explanation on augmented reality for those that are unsure about augmented reality.
Aurasma is an app that you can download to create your own Auras. These customized Auras that you make can be displayed via your device's camera. The Aura may display an image, link, video, etc.
Heartland Area Education Agency provides a list of Augmented Reality apps that they have on their devices.
Layar is a site that allows you to create your own Augmented Reality resources. You can make your print come alive. Add images, video, links, social buttons, etc.
Two Guys and some iPads---Check out this website to see how two guys are using Augmented Reality for meaningful instruction in the classroom.