World Brush - AR app where you paint on the real world for others to find
Woolah - Knockout Photo challenges with your friends.
Llama - Phone going off at night? Annoying your colleagues at work? Get Llama!
QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
Photo Find - Navigate to the exact spot a photo was taken
2016 Photo Challenge - Take a photo every day for 366 days