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.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Google Calendar - Spend less time managing your day & more time enjoying it
MARCOM Robot Data Enrichment Engine - Get more accurate data about your prospects, leads and customers with the Data Enrichment Engine.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
CircleBack - Contact sync application.