Relationship for Mac

From Jumsoft:

Relationship helps people organize and manage their contact information, titles (roles, i.e., CEO, Manager, Worker, etc.), campaigns, and resources quickly and easily. It has all the features required for personal or small business uses. Relationship is perfect for those who don't have much time to learn complex customer relationship management applications. It is an easy-to-use and yet powerful application that lets you collect information about your customers, partners, and suppliers, organize contacts by groups and Smart Groups, add custom columns or subcolumns to groups, sync contacts with Apple's Address Book, manage events, write and send e-mails, manage campaigns for contacts, manage associations, add attachments and notes to contacts, import tab-delimited files, and export v-cards.