Breaking the 4-channel Barrier: The PC Tracker War and More
inversephase.tumblr.com
inversephase.tumblr.com
Of course, I am aware of the open-source trackers (like MilkyTracker, etc), but I believe that the FT2 played a huge part of the demoscene and it should be preserved (the original source code).
Fond memories digging through the assembler code of PMODE, his free DOS extender. Learned a lot. Thanks, Thomas!