A great collection of free design resources from the design team at Facebook. Includes device templates, iOS GUI templates, and hands holding devices to give your mockups that little extra something.
I’ve been working on design standards definitions and a style guide for the better part of a year. I’ve reviewed many style guides during that time looking for formatting ideas and general best practices. While my style guide is UI based, I couldn’t help but admire the attention to detail that went into NASA’s brand style guide. Hat tip to the Fast Company article ‘How NASA Stays Beautiful‘ that brought my attention to this gem.