PSD Assets: http://design.tutsplus.com/tutorials/create-a-promotional-iphone-app-site-in-photoshop--psd-5076?utm_campaign=yt_tutsplus_OQGbOI0DZLg&utm_medium=referral&utm_source=youtube.com&utm_content=description

Click 'Download Attachment' on the right side of the page.