Milkytracker is a cross-platform tracking software based on Fasttracker 2 for creating and playing music. It supports the module music formats including 669, AMS, AMF, CBA, DIGI, DSM, FAR, GDM, IMF, MOD, MDL, MTM, MXM, OKT, PLM, PSM, PTM, S3M, STM, ULT, UNI and XM.
Exports to XM, MOD and WAV formats and comes with a built-in sample editor.
Note that although development is ongoing, the Windows version has not been updated since 2013.
