mpg123 is a real time MPEG 1.0/2.0/2.5 audio player for layers 1,2 and 3
(MPEG 1.0 layer 3 aka MP3 most commonly tested).
Among others, it is working with:
Linux, MacOSX, FreeBSD, SunOS4.1.3, Solaris 2.5, HPUX 9.x, SGI Irix and Cygwin.
It is a free software licensed under LGPL (the officially released sources,
but some files in subversion repository may differ).