Blanq – Free Website Design PSD
Complete license info from the Blaz’s site: “All files & free PSDs on this website are free for you to use in anyway you see fit. I’m so relaxed with how you use the files that even Creative Commons is too strict! No attribution is required, you can even use it commercially; all I ask is that you don’t distribute the files on other websites without permission.”
Helpful hint: Dribbble users are nice. If the license is unknown, it is usually because they forgot to mention it explicitly; not because they were being stingy. Ask nicely and they will probably allow you to use it.