expired Serenity for iOS - Free for a Limited Time (Usually $2.99)
tap tap tap, the same company behind Camera+, has made Serenity free (usually $2.99) for a limited time. There's a version for the iPhone and another version for the iPad.
I haven't tried it yet, but it's supposedly a relaxation and stress relief app. Good for those times when you're swamped with OzBargain deals, I guess.