Ah yea, The Player, seen it around here and there.
If I'm correct, you first convert a mod to The Player's own format, which will be more compact and more efficient when playing.
I should add it to the archive I suppose, and perhaps also try it for myself.
It seems The Player does not support ProTracker effects 100%, but should be good enough for most cases. And for the rest, there's always the real ProTracker routine.