For those of us who deal with non Western music

A. Hardware

The legendary Yamaha DX7 that divides the octave into 1024 sections
The legendary Yamaha SY77, which is an evolution of the DX7
The legendary M1 by Korg
Korg monologue analog synthesizer

B. Software

Audacity free software (Windows, macOS, Linux) with which we can build any scale
WorldScales free iPad app
ScaleGen free application for iPad
Gestrument Pro application for iPad
AbSynth by Native Instruments professional VST instrument for computers running Windows & macOS

MetaSynth software for computers running macOS