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, Mac OS X, and Solaris, and can easily be adapted to other Unix operating systems. runit implements a simple three-stage concept. Stage 1 performs the system's one-time initialization tasks. Stage 2 starts the system's uptime services (via the runsvdir program). Stage 3 handles the tasks necessary to shutdown and halt or reboot.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.