Addresses for GNUstep is a versatile address book application for managing contact information. It stores addresses, phone numbers, pictures, instant messaging information, email, homepages and whatever. Addresses is also a framework that allows access to the addresses database in a way that is source code compatible with Apple's AddressBook.framework. It also contains a view framework to facilitate the construction of applications that use the contact database.
WWW: http://gap.nongnu.org/addresses/index.html