Digital Clock 4 - Beautiful customizable clock with plugins

Freebyte Task Scheduler - Freebyte Task Scheduler, freeware for Windows and Linux/Wine.

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

VisualCron - VisualCron is an automation, integration and task scheduling tool for Windows.

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

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.