Freebie – PSD – About us & Metrics – Freebie
From the author:
Tell me what do you think about it, feel free to use it for personal or commercial use, I just ask you to mention the credits and send me your wonderful works.
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.