The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. It provides client accuracies typically within a millisecond on LANs and up to a few tens of milliseconds on WANs relative to a primary server synchronized to Coordinated Universal Time (UTC) via a Global Positioning Service (GPS) receiver, for example.
LaunchControl is a fully-featured launchd(8) frontend allowing you to manage and debug system and user services on your Mac. It provides everything you need to load, unload, start, create, edit, remove, or troubleshoot launch services. It supports all documented features of launchd, reports potential problems before a job is even started, and makes sure you always create valid configurations. It supports user LaunchAgents and Global and System LaunchAgents/Daemons. It shows all services and their status at a glance, and misconfigured services are highlighted. You can enable or disable services, and find them with a job filter. Not just a plist editor, it provides a dedicated interface for every configuration key with an adaptive interface that displays only information relevant for the selected job.
xllmnrd is an IPv6 LLMNR responder daemon (primarily for GNU/Linux operating systems). It allows Microsoft Windows clients to get the IPv6 address of a server on the same local network without any DNS configuration and effectively complements IPv4-only NetBIOS name resolution provided by Samba.
downtimed is a program that monitors operating system downtime, uptime, shutdowns, and crashes and records such events. At OS startup it logs information about previous downtime. It then periodically updates a time stamp file on the disk, which is used to determine the approximate time when the system was last up and running. During a graceful system shutdown, it records a time stamp in another file. The downtimes(1) command line tool can be used to inspect records of past downtime.
PerlDaemon is a minimal Unix daemon framework. It can be programmed in Perl to perform any task. It supports automatic daemonizing, logging and logrotate support, clean shutdown, and PID files (including a check on startup). It's easy to configure and easy to extend by customizing the daemonloop subroutine.
ulatencyd is a scriptable daemon which constantly optimizes the Linux kernel for best user experience. The default configuration tries reduce the latency for a typical desktop system and protects the system from malicious processes and groups. With a different configuration, all other types of systems can be adjusted as well.