https://www.gnu.org/software/parallel/parallel_examples.html

There was a neat binary named "SLASH.COM" which would allow you to create a submission file ("$$$.SUB") by running "SLASH FOO ; BAR ; ECHO HELLO".

Of course CP/M is a dead system, mostly.

> For instance, you need a webserver, a workqueue and a database to run standalone all together.

This is the only real use-case that I would have for a tool like this and it's already been solved for nearly 15 years by foreman [1]

[1] https://github.com/ddollar/foreman