Jeskola Buzz Tracker. Making tracks in a vertical midi step sequencer with no mixer was wild AF.
IIRC it came with an awesome drum kit called PSI Drums and a set of proprietary plugins (non VST) which included several cool synths abd Whitenoise Stereodist - the most brutal distortion I've ever heard, surpassing Ohmicide, Coldfire and Rift in its ability to turn things into aggressive digital terrain.
Migrated to Fruity Loops pretty soon thereafter
Same! I have a few of my very early very primitive tracks in Buzz.
Jeskola briefly revived it so if you're wanting to return to trackers could be worth a look. Renoise is still hyped (haven't tried it) as is the hardware Polyend Tracker (also haven't tried it).
I'm more of a (virtual) modular than a tracker mindset these days so a combo of FL, Bitwig, Reaktor, Plugdata etc to make a fusion of industrial and idm--
https://sunthief.bandcamp.com/album/thy-neighbors-looking-glass