FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Cardhop - The Mac contacts app you'll want to use.
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.
Keep In touch - Keep in touch with thousands of people
ContractHero - Intuitively organize contracts and be reminded of deadlines
Webby - Webby allows to use Facebook, Youtube or any web app as a regular desktop apps, integrated with the...