Cardhop - The Mac contacts app you'll want to use.
about.me - About.me lets you quickly build simple and visually elegant splash pages that points visitors to your content from around the web. Get started today.
The Contact Guru - Managing your contact list so you don't have to
Pulse Uno - Let them know about you.
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
ContactRescue - Magically get your address book up-to-date and accurate