daemontools is a collection of tools for managing UNIX services written by D. J. Bernstein.
daemontools
is a set of tools for managing unix services (daemons), including stopping, starting, restarting, logging, and monitoring them.
It consists of a suite of utilities which allow you to interact with the supervise
program which is ultimately responsible for starting, monitoring, and (in the event of an untimely death) restarting services.
It offers functionality system to runit, without replacing your entire init
subsystem.
More information can be found on the daemontools homepage.