+$Web Design for Babies is a cute book designed to teach toddlers how the web works.
+$Leafsnap – developed by the National History Museum – is a clever iOS app that visually identifies leaves.
+$20 Day Stranger is an experimental苹果手机+$app that swaps the user's day-to-day experiences with those of an anonymous stranger.
+$Bankrolled by John McAfee, Chadder is a super-secure encrypted chat app forAndroid的+$, designed to keep the NSA at bay.
05. +$Nicely Said
+$Nicely Said by Kate Kiefer Lee and Nicole Fenton is a fantastic, practical and elegant guide to improving your web writing.
+$Waygo translates Chinese and Japanese into English in real time. It's genius. Try it.