Flat designs is the new trend and it is now visible from website and mobile phones, from user interface to web design, from app design to detailed icons. If you are looking for something to boost your working time and make things easy rather than spending much time to design your own flat icons. Here is free stuff that you can download and utilize to your next or current project.
This flat icon bundle includes rounded and square social media icons provided by Jorge Calvo García
And if you missed the previous freebie, you can check out Freebie: iOS 7 Home Screen PSD.