daemon
computer program that runs persistently as a background process to provide a service
Tor
daemon and utilities for an anonymizing network
Network Audio System
open-source audio file transfer system
Windows service
component of the Microsoft Windows operating system
timed
time daemon that maintains system time synchronization with time servers via the Time Synchronization Protocol
Enlightened Sound Daemon
Sound server
moused
mouse daemon on FreeBSD systems
Internet Relay Chat daemon
server software that implements IRC
cron
time-based job scheduler
JACK Audio Connection Kit
professional sound server daemon