Look at that! Flat icons escaped to a new dimension. https://www.behance.net/gallery/20126697/La-Poste
Nicely done example of the "flat" style icons with the angled cast shadows so popular these days.
Good ref, 3d gives a playful feel
Kinda Flat Icons PSD More
AWESOME 3d Icons by Kadasarva
I really like the top half of the designs (though they're perhaps a little too detailed), but not so much the bottom half. I seem to have a thing for vivid autumn colors. That would be good to remember for this project and my own designs.