Ask HN: What is your favorite open-source job scheduler

Too many business scripts rely on cron(8) to run. Classic cron cannot handle task duration, fail (only with email), same-task piling, linting, ...

So what is your favorite open-source, easy to bundle/deploy job scheduler, that is easy to use, has logging capacity, config file linting, and can handle common use-cases : kill if longer than, limit resources, prevent launching when previous one is nor finished, ...