Address Book Server is a free (closed source) software that extends the functionality of Address Book X LDAP. The biggest new feature is bi-directional sync of your entire Address Book or selected groups.
With Address Book Server users will be able to synchronize their entire Address Book with other people located on the same network, as well as over the Internet.
Address Book Server is a cross-platform application written in Java. It's compatible with Linux, Mac OS X and Windows operating systems.
- Java 2 Standard Edition Runtime Environment