Cobook

Cobook is an extension of the integrated Mac OS X address book. It synchronizes all data stored in the address book and import all contacts from Facebook, Twitter, XING and LinkedIn automatically. Optionally, contacts can be divided into categories. If you type, for example: work, only contacts are displayed which are in this category. In addition, CoBook address books can be synchronized with the iCloud and thus with the personal Mac OS X address book.