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.

CamCard - CamCard reads business cards and save instantly to phone Contacts.

Google Calendar - Spend less time managing your day & more time enjoying it

Scanbizcards - Maximize your marketing events ROI with ScanBizCards.

Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.

Sansan - Sansan provides a internal contact sharing service for companies.