Mikmod is a module player and library supporting many formats, including mod, s3m, it, and xm. Originally a player for MS-DOS, MikMod has been ported to other platforms, such as Unix, Macintosh, BeOS, and Java(!!)
Drum machine compiler, generic music sequencer and mixer: Write or generate drum and tone patterns in a simple programming language. Mix it using the sample assembler (asampler). Renders to files or plays real-time. Very portable. Works on old hardware.