System Scheduler - System Scheduler for Windows, Free Task Scheduler Software replace Microsoft Windows Task Scheduler
Crontab UI - Easy and safe way to manage your crontab file
VisualCron - VisualCron is an automation, integration and task scheduling tool for Windows.
Scheduled tasks - GNOME GUI for configuring a users' cron (automatic jobs). Some of its features are:
Freebyte Task Scheduler - Freebyte Task Scheduler, freeware for Windows and Linux/Wine.
024h Lucky Reminder - 024h Lucky Reminder is a reminder software for home and office.