Conforme o comentário do @ Gnoupi, enviei minha versão caseira para o github.
Atualmente não há exe (você tem que baixar e construir você mesmo). Eu provavelmente vou consertar isso em breve.
ContactManager no github
ContactManager was born out of a frustration with Outlook and Gmail contact management, which don't include the notion of 'household' - this makes it difficult to manage (for example) a family's address, at the same time as individual mobile phone numbers.
ContactManager is very basic: it doesn't send or receive emails, doesn't do mail merges. All it does is manage contacts, and people. A contact can be a business, or a family. Each contact can 'contain' zero or more people. There are a limited number of fields that ContactManager knows about (address, phone number, email, birthday etc.). Anything else can be added to the 'Notes' field.