Oldschool
Milkytracker - Inspired by FastTracker 2 (GPLv3)
Schism Tracker - Inspired by Impulse Tracker (GPLv2)
chibitracker - Inspired by Impulse Tracker (GPLv2)
snibbetracker - Simple tracker (MIT)
TIATracker - Make Atari VCS 2600 music from GNU/Linux (GPLv2)
pt2-clone - Inspired by ProTracker 2 (BSD-3 clause)
hivelytracker - Inspired by AHX (BSD-3 clause)
BambooTracker - For the YM2608/OPNA chip (GPLv2)
GoatTracker 2 - Make C64 music from GNU/Linux, used reSID (GPLv2)
PLEBTracker - Terminal-based music tracker (MIT)
Modern
Kunquat - Supports notation for performance (CC0)
Bintracker - Front-end for an audio programming language called MDAL (BSD-3 clause)
zytrax - Supports VST2 plugins via VeSTige (MIT)
Tutka - Qt5-based MIDI tracker (GPLv2+)
