Google Calendar, Fantastical, Notion Calendar, BusyCal, DigiCal, Cozi, Cron Calendar, Calendar Lock PEA, Greg, Fossify Calendar, Calendar Buddy, wtplan, HEY Calendar, One Calendar, Me Calendar, CalenGoo, Sunrise Calendar, Desktop Calendar, GroupCal, Timepage, do-Organizer, Desktop iCalendar, Simple Calendar, Calcurse, jquery-calendar, Nextcloud Calendar, UKs Kalender, RemindMe desktop calendar, GNOME Calendar, Active Desktop Calendar, Zoho Calendar, BORG Calendar, 30 Boxes, Attendexer, SSuite My Calendar Diary, GMinder, gsimplecal, CalendarWiz, qOrganizer, Google Calendar Checker, GMX Calendar, Calbird, ChronoFlo Calendar, MemoCalendar.net, Caliander, iCalViewer, Calendarify.Me, Kalendar, Kin Calendar, vircorX, HipCal, Spicebird, KeepTime, AnCal, Calendarific, Calendarscope, Merge Calendar, PreMinder, Coolendar, Handy Calendar, Polar Liquoo, Visual Calendar for Tablets are some alternatives to Lightning Calendar.