Bootstrap V3.0.0 PSD Template
I personally think a PSD kit for Bootstrap misses the point entirely. Just use the Bootstrap itself if you want to create some mockups!
Could be useful for those who don’t know HTML/CSS, though.
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.