Awesome

UIViewController+MHSemiModal

This is a category on UIViewController that makes it easy to present modal view controllers that only partially cover the screen.

Instead of:

[self presentModalViewController:controller animated:YES];

You now do:

[self mh_presentSemiModalViewController:controller animated:YES];

To dismiss the semi-modal view controller, you do:

[self mh_dismissSemiModalViewController:controller animated:YES];