ios: sample source looks like ios address book

in my project, i'm going to implement a app very like the ios address book. however, the native address book framework doesn't conform my requirement, you kno开发者_StackOverflow社区w ios address book framework doesn't allow further customization.

hence, do you know any third party project/sample we can use to make further customization on it?? Or any other idea would be appreciate.

Thanks