SlackBuildsOrg/system/supervisor

Supervisor is a client/server system that allows its users to monitor
and control a number of processes on UNIX-like operating systems.

It shares some of the same goals of programs like launchd, daemontools,
and runit. Unlike some of these programs, it is not meant to be run as a
substitute for init as “process id 1”. Instead it is meant to be used to
control processes related to a project or a customer, and is meant to
start like any other program at boot time.