The waterfall (i.e., Pinterest-like) layout for UICollectionView.

The iHasApp iOS Framework allows you to detect installed apps on a user's device.

A UICollectionViewLayout subclass to put items in a quilting pattern

A memory and CPU efficient implementation of a collection view with cells that bounce around like they do in the iOS 7 messages app

UICollectionViewLayout for displaying cells in a semi-circle with a nice fish eye effect

Waterfall-style implementation of UICollectionView layout

UICollectionViewLayout for displaying cells in groups (highlighting one of them).

Bookshelf like iBooks layout for UICollectionView.