3DTOAD.com is a library of 3D images that you can rotate and explore. It includes skulls, skeletons, dissections, coral, geology, and even music. These could be great visuals on an Interactive White Board or used on an iPad.
This is a great article about the evolution of reading. Given the influx of iPads and eReaders into classrooms, the concept of "books" is certainly changing.
This free app combines the best of Panoramio and Google Maps into one app. Think of using this to export the settings of novels, the geography or culture of a historical location, or a virtual field trip.