BusyContacts - BusyContacts is a contact manager for macOS.
Steward Database - Steward is a personal database for organizing everything. It's easy to use.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
Pakker - Pakker is an easy to use personal database with a visual form designer and easy sharing.
Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.
Monica - Monica is an open-source personal CRM to keep track of your friends and family.