Camera: creativity (the best camera really is the one you have with you)
Photos: communication (show other people pictures)
Voice memos: creativity (take notes when text just won’t do)
App Store: configuration (upgrade phone, try not to waste money)
Clock: utility (world time)
Games: entertainment (a few odd games)
Entertainment: (oddments like youtube, ipod etc.)
Flashcards: learning (decent flash card app, but I don’t seem to have integrated this into my life very well. Was using it for hiragana, until Kana LS turned out to be good.)
Clockwork: utility (handy little metronome for drumming/music stuff)
Calculator: utility (it’s funny how often people have old-fashioned single-purpose calculators these days…)