XPMCK is a music (expressed in MML) compiler kit targeted towards various video game systems. It currently supports the following systems:

Capcom Play System (VGM output only)
ColecoVision
Commodore 64
MSX (KSS output only)
Nintendo Gameboy / Gameboy Color
SEGA Master System
SEGA Game Gear
SEGA Genesis

Besides the compiler and its source code, the kit includes playback libraries for all supported systems, as well as examples and brief documentation.

Changes:

Added support for the AY-3-8910 (PSG) and Konami SCC to the KSS playback library.
Added a SYNC command for the C64 target.

Thanks to the author, mic, himself for the news via ICQ.

http://jiggawatt.org/muzak/xpmck/