List of free task stuff for developerππ½
If you're looking for all programming tools around task (not just free). Check this page List of task Programming Tools

Beew
Schedule and monitor one-time and recurring HTTP calls to your website or API. Beew was created for developers that don't want to manage hundreds of Cron tasks.
Tag: api, cron, task, scheduling
Up to 2 schedulers 15 requests per month Limited storage for log Failure notification Execution priority Recurring executions Specific date and time execution Reliable task execution 24-hour support response time

Ctfreak
A centralized task scheduler. Say goodbye to cron and maintain, schedule and run all your shell scripts from one place.
Tag: cron, scheduling, automation, task, ssh, webhook
Single Sign-On Unlimited nodes Unlimited tasks Unlimited notifiers Unlimited executions Up to 3 users Sequential task executions