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 site offers tools for studying vocabulary. There is also a selection of apps available. What makes this interesting for students is the visuals provided by both images as well as video to give additional cues for learning words.
This app is free until April, though know that some content becomes an in-app purchase. Bookabi allows students to create their own storybooks with 2D and 3D characters. They can upload their own photos and pictures plus save and share their final projects.
This could be the best $.99 spent on an app. Tools 4 Students includes 25 graphic organizers that can be annotated in the app and then shared via email.
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.
This free app from McGraw Hill is great for elementary school students to work on building their vocabulary. Students can either play on their own or with a partner. Bluster works on rhyming, prefixes & suffixes, synonyms, homophones, adjectives, and over 800 vocabulary words.
This list comes from Teacher Reboot Camp. The suggested apps provide multiple ways for students to interact with various aspects of stories: plot, characters, setting, etc.