The license on the IOS GUI:
<a href="http:&#x2F;&#x2F;facebook.github.io&#x2F;design&#x2F;license.html" rel="nofollow">http:&#x2F;&#x2F;facebook.github.io&#x2F;design&#x2F;license.html</a><p>You can&#x27;t use any of this in an actual application. So, I make a mock up and show it to someone and then my finished work has to be different from the mock up to avoid copyright infringement? In that situation, I would say I have intentionally defrauded my customer(&#x2F;employer) and they should refuse to pay (or fire me) and win.<p>(More likely still, I use them anyway since a graphic artist has made the mock-up and I presume they created or correctly sourced the graphics.)