darkman is a framework for dark-mode and light-mode transitions on UNIX
desktops.
It runs in the background and turns on dark mode at sundown, and turns it off
again at sunrise.
It's designed to run in the background.

• darkman @ GitLab.

spotifyd is an open source Spotify client running as a UNIX daemon.
It streams music just like the official client,
but is more lightweight and supports more platforms.
It also supports the Spotify Connect protocol,
which allows the official clients to control it remotely.

• spotifyd @ GitHub.

Daemon that sends local hardware information to Home Assistant.

This is an unofficial Desktop Companion App for Home Assistant written in Go.

The companion is running as a background process and sends local hardware information to your Home Assistant instance. Additionally, you can send notifications from Home Assistant to your Computer and display them using notify-send.

• Episode 580 - Brent's Boogie Bus Broadcast Bash @ Linux Unplugged.

Festival, a music player.

Festival is a music player for local album collections.

Festival @ GitHub.

Advanced, production process manager for Node.JS

PM2 is a production process manager for Node.js applications with a built-in load balancer. It allows you to keep applications alive forever, to reload them without downtime and to facilitate common system admin tasks.

• PM2 @ GitHub.