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.

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.

Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.

Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.

Free Address Book - In our contact management software you can store fast and easily name, phone numbers, birthdays, address, company name, city, mobile numbers, insurance and loan info, e-mail addresses.