Evercontact - Your contacts always up to date and automatically with Evercontact.
FullContact - Put the power of full contact information into your web or mobile apps.
Pobuca Connect - Connect with your contacts.
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.
CRM-gx - Contact Management
Justphonebook - Justphonebook provides web or mobile access to a unified corporate phone directory that can be shared to all employees.