Android: Chances are you talk to your contacts through more than one medium: IMs, email, phone calls and more. Ready Contact List shows you recent messages you've exchanged with contacts when you get ready to make a call.
The app replaces both your dialler and your contact list. The app itself has a gorgeous interface, focusing largely on gestures to navigate. Ready is currently in beta, so you'll need to join the Google+ Community here and follow the instructions at the source link below to install it.