If you are looking for a unique way to present paged data (series of images or other views), iCarousel is worth a look. This is a very flexible control with many paging styles available including linear, cylinder and a coverflow look. There are also hooks available in the source code to provide your own paging effects.
The screenshots that follow are from the demo application, included in the project, showing the coverflow and cylinder effects:
The iCarousel project includes a readme file that clearly describes the properties, methods and protocols in the source. In addition, have a look at iCarousel.h and iCarousel.m, the code easy is to read and covers a number of iOS topics including: scrolling, gestures and transforms.
Open Source Recommendations ?
Have you written or worked with iOS or Cocoa open source that you think others would find interesting, send me a note.