Cardhop - The Mac contacts app you'll want to use.
FoundersList - Everything you need for your startup or new business
The Contact Guru - Managing your contact list so you don't have to
Ripple - Ripple connects banks, payment providers, digital asset exchanges and corporates via RippleNet to provide one frictionless experience to send money globally
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.
Causr - Connecting like-minded people who are nearby on the go.