Gronk is a Web-based MP3 jukebox. It generates heavily-hyperlinked Web pages listing all of your ripped CDs, by extracting information from CDDB data. These Web pages allow easy selection of songs or albums to play, and when nothing has been explicitly selected, it selects songs randomly. Playback is done via either XMMS or mpg123.
GSI is an easy-to-use network audio system that gives applications, through a very simple API, sample playing with stereo, 3D, doppler effects, music playing (MIDI, HMP, MUS), and CD playing and ejecting/changing. GSI also contains a separately usable sound/music loading/saving/format conversion library libgsif, although saving/format conversion is not completely done. It is known to run on Linux, OpenBSD, and FreeBSD, with support for /dev/audio (8000Hz mono mulaw), OSS, ultrasound project drivers, and FreeBSD's pcm system (from 0.9.4 on).
Mserv is a jukebox-style music server designed to play MP3, Ogg, etc. (configurable) files based on ratings of users who are logged in to the system. It includes features such as searching, filtering, biased random play, queuing, talking, online and off-line track editing, and a standardised TCP protocol. This allows for a variety of interfaces including a built-in telnet interface, a command line program for scripting, a Perl-based Web client, and many 3rd-party GUI front ends.
RAT is an RTP audio conferencing and streaming application that allows users to particpate in point-to-point and multi-point audio conferences over the Internet. Developing features include multiple sampling rates, mono/stereo, loss concealment, and IPv4/IPv6 support, and both versions feature encryption and run on a range of platforms.