I made a few everyday devices and items I use into flat PSDs for a project I'm working on and decided to share them. Feel free to use them or modify them however you'd like (please give credit), just don't use them sell them or use them commercially without my permission. :)
Download: http://kingdingdan.com/share/Flat.zip
Macbook Pro Retina
Nokia Lumia 920
Generic Monitor
Nexus 7
Generic fancy notepad
Generic Pencil
Generic Printer