Lots of contact apps out there, FullContact is still the best one to me
I've tried a bunch of contact managers - everything from Google Contacts over the social behemoths address books (LinkedIn, Facebook) to the phone-based contact apps. FullContact, while not perfect, is still the best of the lot to me. Integrated with Google Contacts, with a Chrome extension, able to add contact data from a number of other sources.
By Simon S.