Download the Retina Flat icons for free.
Free retina flat icon set
Retina flat icons are becoming popular in the business world. These icons will really show your users that you are serious about providing quality to their screen.While “Retina” is something we associate with Apple right now, I can see the standards being implemented to other devices in different ways.
The navigation retina flat icon looks amazing!
I like the blue chat icon!
I also think the caluclator one looks pretty cool as well.