Mixer.app is a mixer utility for Linux/FreeBSD systems. It is designed to be docked in Window Maker. This utility has three volume controllers that can be configured to handle any sound source, the default sources are master-, cd- and pcm-volume. Sound sources can easily be muted and there is also wheel mouse support.
Mp3blaster is an interactive text-based program that plays several audio file types (MP3, Ogg Vorbis, wav, and sid). It is one of the few audio players for the text console that allows full interactive control during playback. One of its key features is the ability to compose a very flexible playlist (while playing!). It plays most MP3 formats and has full mixer support built in.
SoundTracker is a pattern-oriented music editor (similar to the DOS program 'FastTracker'). Samples are lined up on tracks and patterns which are then arranged to a song. Supported module formats are XM and MOD; the player code is the one from OpenCP. A basic sample recorder and editor is also included.
Umix is a program for adjusting sound card volumes and other features in sound card mixers. You can control your volumes, balances, and recording sources flexibly from the command line or with a ncurses user interface with familiar vi/emacs keybindings. Umix supports multiple mixer devices. All settings can be saved and loaded from a file.
Volume.app is a simple and attractive audio volume control program in the dockapp form factor, intended for use with X window managers such as Window Maker, Blackbox, and Afterstep. It differs from many other dockapp mixer programs in that it does not require precise control of the mouse to perform volume adjustments. Its simplistic design is also such that it can only monitor/control one mixer source at a time.