Freebyte Task Scheduler - Freebyte Task Scheduler, freeware for Windows and Linux/Wine.
Digital Clock 4 - Beautiful customizable clock with plugins
System Scheduler - System Scheduler for Windows, Free Task Scheduler Software replace Microsoft Windows Task Scheduler
RoboIntern - An automation and scheduling software with focus on repetitive office tasks.
VisualCron - VisualCron is an automation, integration and task scheduling tool for Windows.
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.