Kontakter is an easy to use yet strong address list with advance search functionality and a very intuitive user interface.
The strong search bar can find everything, just by writing partial strings contained in any field of your contacts.
The contacts are stored in a SQLite database and can be synchronized over the network with a central database provided by kontakter's server.
Kontakter is the right program to manage your contacts!
Features:
* strong search
* intuitive user interface
* cross-platform (Windows, Mac OS X, GNU/Linux)
* export/import contacts in the vCard format (.vcf)
* export contacts to PDF
* print function
* display addresses on google maps
* export/import SQLite databases with all your contacts
* up to 6 custom fields
* account password protection
* multiple accounts
* contacts are stored in a SQLite database
* synchronize your contacts with a central database over the network
* Kontakter-server provides the central database
* feedback menus for the user
* internationalization (german and italian, soon more)

The license of this software is Freeware, you can free download and free use this email address list software.