Reminder Commander - Reminder manager that reminds you about important events in advance.
Reminduck - A simple reminder app made for elementaryOS with Vala and GTK. - matfantinel/reminduck
Holiline Reminder - Holiline Reminder is both an event reminder and a calendar.
024h Lucky Reminder - 024h Lucky Reminder is a reminder software for home and office.
Digital Clock 4 - Beautiful customizable clock with plugins
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.