Reminduck - A simple reminder app made for elementaryOS with Vala and GTK. - matfantinel/reminduck
Reminder Commander - Reminder manager that reminds you about important events in advance.
Holiline Reminder - Holiline Reminder is both an event reminder and a calendar.
Digital Clock 4 - Beautiful customizable clock with plugins
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
incron - This program is an "inotify cron" system. It consists of a daemon and a table manipulator.