Basically the Moto X functionality.
Google Play Store
ActiveNotifications allows you to receive important notifications when your screen is off. When you miss a call or receive a new email/SMS, the display will discreetly light up to let you know, without needing to unlock the device. Most phones only have a pulsing notification LED that doesn't actually tell you anything about the incoming notification - with ActiveNotifications, you can immediately decide if something is important enough to act.
* Notifications don't light up when your phone is in your pocket, purse, or face down to avoid accidental unlocks
* Select which app-notifications you'd like to receive via ActiveNotifications
* "Sleep at night": Don't show notifications at night (Premium feature)
* "More privacy": Hide additional notification details (e.g. SMS text, sender) (Premium feature)
* Automatically switch off screen when dismissing notifications(Premium feature)
Google Play Store