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.
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.