A virtual reality game which makes you move around.
Read the full story here: ReadWrite Why I Think Google’s Ingress Could Redefine Mobile Gaming [Video]
Googles Ingress: http://www.ingress.com (a great page design btw.)
Polar is a delightful, fast app to make and vote on polls instantly. Read the full story here: Polar: A Simple App That Explores Just How Smart A Simple App Can Be