Microsoft Office Outlook, Google Calendar, Rainlendar, Taskade, iRedMail, Morgen, Calendar Lock PEA, Fossify Calendar, Lightning Calendar, DeskTask, Desktop Calendar, Todorant, Desktop iCalendar, Simple Calendar, Year Glance, Reminder Commander, RemindMe desktop calendar, Active Desktop Calendar, GMinder, Easy Calendar, Kalendar, HipCal are some alternatives to UKs Kalender.