Commodore 64 music editor

GoatTracker is a cross-platform tracker written by Lasse Öörni, producing SID chiptune music for the Commodore 64, and released with source code under the GPL. It is notable for being possibly the only SID chiptune-composer NOT native to the C64, as many alternative composers (including JCH, and CyberTracker) only execute on the C64 or inside C64 emulators.