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.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
Google Calendar - Spend less time managing your day & more time enjoying it
Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.
BusyContacts - BusyContacts is a contact manager for macOS.
Open Contacts - Open Contacts is an advanced address book program for managing contact info of individuals and...