php_crontab

The crontab tasks can be stored in any way you what. For example, mysql, reids. What's more? You can develop a web application to manage them.
Logs of the crontab tasks can be configured as you want.
The tasks of different users can be managed together.
Multi-Process, every task is a process.
You can set the user and group of a crontab task
STDOUT can be redirected
Based on react/event-loop, it can run as a daemon.
A HTTP server which you can manage the crontab tasks through it.