I have introduced some Free iPhone Icons for developers and A huge collection of icon sets for designers some weeks ago. Now some new Free Android Icons for Developers. This package includes 30 PNG menu icons plus the additional source files for further customization. All icons are distributed under a Creative Commons Attribution Share Alike license. Feel free to use them in any form in your projects or even remix them.
Here's a nifty way of integrated augmented reality (AR) codes with social media - print one on a t-shirt which will allow people with an AR enabled device to