NaturCalendar, like VueMinder, is a desktop calendar and scheduler for a PC. This software is geared to let you keep track of holidays, birthdays, appointments, and other events. It also has diary components. Version ST can run from the system tray; you can easily

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get your upcoming reminders. It has 39 predefined world holidays; it also comes with human voice
reminder sound and multiple event colors. For European users there are European date formats alongside the American version.
Unlike the other programs reviewed here, NaturCalendar offers more complete control of the events associated with the calendar. In that sense it it not a social-networking program like the other two. You cannot use it to share files and photos. It is to manage your daily and weekly events and get reminders about them. It comes with a full-version 30-day free trial. After that it is $29.95 for the license.
Source: NaturCalendar