This flat interface is inspired by a iOS 7 redesign concept designed by Alexey Masalov. M’Flat theme comes with beautiful flat icons which are same as in the design by Alexey. Designed by Mushcube, the theme had 38 icons in PNG when Winterboard for iOS 7 wasn’t working.
But a Reddit user added more icons of same style in the theme and ported it to work on Winterboard.
if you like icons with flat design this project is for you. Enjoy