And if you want to edit them or look at the pattern/sample data, I recommend Schism Tracker, a modern open-source clone (with new features) of Impulse Tracker.
I too have fond memories of going through all the directories for games and demos looking for cool stuff (graphics and sound files). Nostalgic shout-out to "Jonas' Mega Ripper", a tool which would go through data files and executables looking for image/sound chunks and save them to separate files.