Kin - Kin is money for the digital world. It is used to generate value through a shared, decentralized cryptocurrency in a digital ecosystem of apps and their users.
BusyContacts - BusyContacts is a contact manager for macOS.
InternetCaching - An internet treasure hunt platform.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
Plan - Plan is a better way to organize.
Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.