Gadget: Yo

We love it because: The idea is a simple one: instead of long elaborate messages to a friend or loved one send a short message that screams "Yo!" to the recipient when they receive it. The coolest thing about it is that a Yo can mean anything from "thinking about you" to "I'm outside, hurry yo ass up". Add to the fact that it's really addictive and it's not hard to see why the app was downloaded millions of times in it's first few hours of release.

Where:  Apple App store and Google Play store

Price: Free, Like oxygen on earth!