Dribbble Optimized Magnified PSD and Action
Ideal 800 x 600 resolution images.
Dribbble Optimized Magnified PSD and Action is a free design resource made by Dribbble user Mario Semeš. As far as I can tell, its license is Unknown.
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.