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.

Drupe - Next generation contact manager and dialer.

SA Contacts Lite - SA Contacts Lite app comes up with features to help you in transferring all your contacts in your phone book between all your handheld devices without much of a stretch.

Simple Contacts - Contact lens prescriptions from home

Kontact - Kontact is the integrated Personal Information Manager of KDE.

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