Updated 2010-09-10 10:15 UTC – Stable Quality
Free & Open Source license
Unix Amiga Delitracker Emulator for the command line.
UADE plays old Amiga tunes through UAE emulation a free (as in freedom) implementation of Eagleplayer and Delitracker API for UNIX.
It supports over 200 formats. See more at http://zakalwe.fi/uade/ and http://en.wikipedia.org/wiki/Unix_Amiga_Delitracker_Emulator
NOTE: UADE will eat your battery as playback is done trough emulation and it takes a lot of CPU.