Why can ContactKeeper be useful for me? That's the question I told myself when I was installing it, and when I first used it I realized that there were too many reasons, but the main one was because now I have all my contacts in order and it can be used as a backup of my non-digital agenda.
Personal data, email, address, phone numbers, notes,... you can include what you want in ContactKeeper.
Once you'll have included all your contacts, access them through the intuitive interface. Finally, you can create a birthday calendar and program alarms to advise you two days before the birthday.