Marcus Gellermark just released a free set of 177 country flags icons that belongs to a project that he is working on, the icons are on Github for everyone to download which is awesome.
At a point every designer needs flags in his design and this free set is just the thing you need. This set is available on Github and new flags will be added occasionally as he is working on more at the moment.
Format: Sketch, PNG
Creator: Marcus GellermarkDownload Flags