"Both of these apps can be used by students without creating any kind of new online accounts. Neither one is entirely perfect, but they're both quite good." - Opinion is an iPad app & recordings can be saved to Soundcloud & Evernote. StoryCorps is available for iPhone and Android devices, and is good for interviews.
This is a fun Android and Apple app from University College London were players complete a range of games to exercise the brain cells and provide researchers with real, but anonymous data to use in their study.
http://ictmagic.wikispaces.com/Science
VocabularySpellingCity is a fun way to learn spelling and vocabulary words by playing engaging learning games using any word list. The most popular activities are Spelling TestMe, HangMouse, and our vocabulary games, available to Premium Members. The most popular word lists are Sound Alikes, Compound Words, Hunger Games and SAT Words. This is a free app!
"Better essays, faster! Simply scan the barcode of a book using your mobile phone camera, and ReferenceME will create your bibliography and citations in moments. If there is no barcode you can simply enter the books ISBN or you can enter the details yourself, and turn them into references in any of the major styles used by universities and libraries."