Appointment-Plus continues to be the online scheduler calendar of choice among service-based businesses and organizations as over 15 million individual users in the United States and 11 other countries worldwide have utilized the software since 2001.
iPhone and iPad apps tagged "calendar app."
Numbers Don't Lie: Appointment-Plus is the Preferred Online Scheduler Calendar with Over 15 Million Individual Users
Countdown Calendar Helps You Keep Track of Special Days
Countdown Calendar, from developer Greg Maletic, helps you keep track of important events that are impending and helps you stay informed of just when the big day will arrives. For me, Countdown Calendar could also help me from falling into hot water with people because I forgot a special date or an appointment.