Reminduck - A simple reminder app made for elementaryOS with Vala and GTK. - matfantinel/reminduck
System Scheduler - System Scheduler for Windows, Free Task Scheduler Software replace Microsoft Windows Task Scheduler
Reminder Commander - Reminder manager that reminds you about important events in advance.
VisualCron - VisualCron is an automation, integration and task scheduling tool for Windows.
Digital Clock 4 - Beautiful customizable clock with plugins
Freebyte Task Scheduler - Freebyte Task Scheduler, freeware for Windows and Linux/Wine.