Quite a while ago, we wrote about an upcoming hands-free (and eyes-free) interface code-named KITT. The interface - intended for use in the car or in other places where looking at your phone isn't wise - would be stripped down, displaying a black screen and large iconography, and would have the ability to read notifications aloud, among other things. More recently, an icon for an app called Google Hands-Free showed up in a promotional gif posted to Google's Google+ page, hinting that the service was still under development.
Google Hands-Free Shows Up Again, This Time In Google Search was written by the awesome team at Android Police.