Programmer "Ethan Allen" (no furniture jokes, please) offers up an iPhone soundboard called, with good reason, Annoyance! In case the above screencap's icons aren't clear enough, the sounds contained include a baby crying, gates closing, a car horn, slurping, a chainsaw, a hyena laugh, a jackhammer, a radio being tuned, a siren, hiccups, a baby squeak toy, and a man screaming. Sez Ethan:
YOU try it in public. We can think of better ways to draw unwarranted attention to ourselves.
[US$0.99 from the App Store]