runit - runit is a cross-platform Unix init scheme with service supervision, a replacement for sysvinit...
Supervisor - Supervisor is a client/server system that allows its users to monitor and control a number of...
s6 - s6 is a small suite of programs for UNIX, designed for process supervision. It can be used as an init system, or as separate supervision components.
sysvinit - Savannah is a central point for development, distribution and maintenance of free software, both GNU and non-GNU.
nosh - The nosh package is a suite of system-level utilities for initializing and running a BSD or Linux...
M/Monit - Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.