BusyContacts - BusyContacts is a contact manager for macOS.
4D - 4D is a relational database management system and IDE.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
FileMaker Pro - FileMaker Pro Advanced includes all the features of FileMaker Pro plus a set of advanced tools so you can rapidly build powerful custom apps.
Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.
Philasmicos Contacts 2 - Philasmicos Contacts is a professional business relationships management system for macOS X.