From Headlight Software:
With ContactClone Pro, you can send and receive contacts with either ContactClone or ContactClone Pro. ContactClone Pro lets you share your contacts in groups or categories, so you can access to Business contacts while at work and Family contacts when at home. Pick the contacts from your address book you want to share; or browse the contacts the other person is sharing from their iPhone. Just a click of the person's name will add them into the address book including all information, email, phone number, and the photo. Each group in ContactClone Pro has a different Key that lets you only share your contacts with the people you want, and only the group you want to share with them.