Eleven original overdrive, boost & distortion voicings (guitar AND bass) + a NAM loader.
Eleven original drive, boost and distortion voicings in one pedal, each with drive, tone, level and dry/wet mix:
– Green Man — the mid-humped green legend that pushes an amp into song
– New Dawn — smooth, singing overdrive for lead work
– Dear Rodent Boy — snarling rodent-toothed distortion
– Grunge DS — the bright orange distortion box that soundtracked the flannel decade
– Gilded Horse — the mythical gold transparent overdrive/boost (yes, that one)
– Super Nova — a smooth super-overdrive with a warm asymmetric clip
– Preamp 250 — gritty ’70s preamp-in-a-box distortion
– Echo Primer — the tape-echo JFET front end that warmed up so many cranked rigs
– Tube Chauffeur — the starved-tube chauffeur that drove the great sustained leads: fat clean boost to warm overdrive
– Helsinki Grind — a modern parallel-blend BASS preamp/overdrive: the Mix knob blends clean lows under a tight, aggressive grind (Tone is the fat-to-tight lever: how much low end enters the grind), the sound under a decade of modern low-end records
Stack them in front of the Hex Chain Amp or your own rig. On 64-bit/desktop targets a Neural (NAM) slot runs your own .nam pedal captures alongside the eleven algorithmic voicings; on 32-bit (patchbox-os-arm32) NAM is omitted.
Free and open source (GPL-3).
Credit: Ryan Powell

With 11 drive voicings plus NAM loading in one free, open-source pedal, Hex Chain Drive is a remarkably versatile option for guitar and bass setups.
@Among Us