VortexBox!

Open Embedded Linux Entertainment Center (OpenELEC) is a small Linux based Just Enough Operating System (JeOS) built from scratch as a platform to turn your computer into a Kodi (previously XBMC) media center.

Ampache is a web based audio streaming application and file manager allowing you to access your music from anywhere, using almost any internet enabled device.

LibreELEC is ‘Just enough OS’ for Kodi, a Linux distribution built to run Kodi on current and popular mediacentre hardware. We are an evolution of the popular OpenELEC project. LibreELEC software will be familiar to OpenELEC users, but the project follows its own path and has intentional differences:

The Daphile is the heart of a digital music system. Its primary focus is in storage and playback of your digital music library. It enables the best possible audio quality and future-proof flexibility by providing plug&play support for USB connected digital-to-analog converters (DAC). You can easily setup a multi-zone system just by connecting another USB DAC for each zone.

Logitech Media Server is the server software that powers audio players from Logitech (formerly known as SlimDevices), including Squeezebox 3rd Generation, Squeezebox Boom, Squeezebox Receiver, Transporter, Squeezebox2, Squeezebox and SLIMP3.

A music streaming server written in python,

AudioStreamer is a free web-based audio streamer which gives you easy access to your music. It turns your PC in a streaming webserver. So you can listen to your music from everywhere and on any device(tablet, desktop, smartphone, ...) with a webbrowser..

Sockso is a free, open-source, personal music server for everyone! Its designed to be as simple as possible so that anyone with a mouse and some mp3s can get their friends listening to their music across the internet in seconds!

netjukebox is a web-based media jukebox for MPD, VideoLAN and Winamp/httpQ. It features real-time MP3 streaming from different audio formats. Download single tracks or a whole album in one zip file. It is also possible to batch transcode the whole music collection to another format or bitrate without touching the original files. For more information look at the netjukebox website.

Jinzora Media Server is a web based media streaming and management system, allowing you to stream your music and videos to any device with a web browser.

GeeXboX is a free and Open Source Media-Center purposed Linux distribution for embedded devices and desktop computers. GeeXboX is not an application, it’s a full-featured OS, that one can boot as a LiveCD, from a USB key, an SD/MMC card or install on its regular HDD. The GeeXboX distribution is lightweight and designed for one single goal: embed all major multimedia applications as to turn your computer into an HTPC. GeeXboX runs on x86, PowerPC and ARM devices.

libresonic - Media streaming software

slimpd - PHP/JS based MPD-web-client for large music collections