Freebbble!

Keyboard, status bar and search in light and dark versions. “Completely free”, said the author, so I’m going to assume this one’s free to use both for personal and commercial projects. Adobe Illustrator .ai file.

iOS 7 Components is a free UI Kit design resource made by Dribbble user Derek Bender. As far as I can tell, its license is Free for Commercial and Personal Purposes.

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.