runit is a cross-platform Unix init scheme with service supervision, a replacement for sysvinit, and other init schemes. It runs on GNU/Linux, *BSD, MacOSX, Solaris, and can easily be adapted to other Unix operating systems.
Runit Homepage: http://smarden.org/runit/
Runit Debian Repository: https://salsa.debian.org/runit-team/runit
Init systems comparison: https://cloux.org/init/