Rainlendar - Rainlendar - Customizable desktop calendar
Kana Reminder - Kana Reminder is a program which can be used to set a reminder to be triggered at a specified time.
Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
Desktop-Reminder - Desktop-Reminder is a freeware task planner for Windows to manage your tasks and other to-dos’ in really easy way.
Date Reminder - Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay...
Memo to Me - Online email & SMS reminder service.