Task Scheduler - The Task Scheduler enables you to automatically perform routine tasks on a chosen computer. Task Scheduler does this by monitoring whatever criteria you choose (referred to as triggers) and then executing the tasks when their criteria are met.

Crontab UI - Easy and safe way to manage your crontab file

System Scheduler - System Scheduler for Windows, Free Task Scheduler Software replace Microsoft Windows Task Scheduler

Scheduled tasks - GNOME GUI for configuring a users' cron (automatic jobs). Some of its features are:

RoboIntern - An automation and scheduling software with focus on repetitive office tasks.

024h Lucky Reminder - 024h Lucky Reminder is a reminder software for home and office.