TiMidity++ is an open source MIDI to WAVE converter and player.
mpg321 is a completely Free drop-in replacement for mpg123. It has been designed to work as a drop-in replacement for mpg123, for the use of front ends, shell scripts, etc. It does all mp3 decoding using the high-quality integer-only MAD library.
This SourceForge project page is obsolete. Please visit http://www.musicpd.org/
A simple graphical MTP client for UNIX and UNIX like systems. It supports all MTP based devices including MP3 players, Media Players, Tablets and Mobile Phones.
ReZound aims to be a stable, open source, and graphical audio file editor primarily for but not limited to the GNU/Linux operating system.
mp3 library, advanced ID3V1 and ID3V2 tagger, player. Organize a large mp3 library, over 40,000 songs. Speech synthesis and tag backup utilities. Scripts to maintain and organize song files.
Sweep is an audio editor and live playback tool. It supports PCM (WAV, AIFF etc.), Ogg Vorbis, Speex and MP3, with multichannel editing and LADSPA effects. Inside lives a pesky little virtual stylus called Scrubby who enjoys mixing around in your file
curses-based mp3 and ogg vorbis player for unix-like systems
Songer is an ID3 tagger designed for the ROX desktop that supports the drag-and-drop nature of ROX. It is designed to be a simple tagging utility. Songer currently only supports MP3s and ID3 version 1 tags. Future support of ID3v2 and OGG files is planne
JASAT, The Java Secured Audio Transmission is a client/server system that allows you to keep your audio files archived and encrypted in a secure server-side storage and stream them in a secure way to any java enabled client.
A player for SMAF files (MMF mobile phone ringtones)
Music daemon is a music playing server supporting multiple formats through plugins and multiple playlists. It has a simple protocol for control and communication for frontends.
A program to record and sequentially play audio spots in e.g. supermarkets. This project is now on github: http://github.com/pryds/spotmachine
nOGGin is a full-featured ncurses Ogg Vorbis and mp3 player. CDs can also be played and queries made to freedb. It also supports SHOUT/ICE cast and HTTP/FTP streaming of music files over the internet with IPv4 or IPv6.
tetravex oggserv is a centralised ogg vorbis daemon that by standard comes with a web based interface, but more clients will soon be availible. It functions in the same way as a jukebox. Users can queue up tracks using a client.