Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.
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.
BusyContacts - BusyContacts is a contact manager for macOS.
Drupe - Next generation contact manager and dialer.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
Simple Contacts - Contact lens prescriptions from home