I actually created those images myself (I’m not a photoshop expert though)……so you can download them if you want. Just – Right Click and “Save Image As”….
If you want something better or an actual PSD editable file then you could just search for Clouds PSD, Clock PSD, Social Icon PSD…..the other images on the demo are PSD’s that I searched for from different sites. You can do the same type of search – iPhone PSD, iPad PSD…etc (just make sure they are Royalty/Commercial Free)