Here's a comprehensive list of Nintendo Switch Gadgets

[CharlesFerraro]

The list is alphabetical by engine type with the Gadgets under each type also listed alphabetically. I included what I believe each Gadget is based off of but disagreements are welcome.

Chiptune:
-Kamata (Wave Table Synthesizer) Namco Custom30 chip
-Kingston (Polyphonic Chip Synthesizer) Atari 8-bit chip

Drum:
-London (Hypersonic PCM Drum Module) More or less an original or Akai.
-Tokyo (Analog Percussion Synthesizer) TR-808/909

FM:
-Chiang Mai (Variable Phase Modulation Synthesizer) DX-7 or baby DX

PCM:
-Amsterdam (PCM SFX Boombox) Original or Akai MPC.
-Kiev (Advanced Spacial Digital Synthesizer) Wavestation
-Marseille (Polyphonic PCM Synthesizer) M1

Subtractive:
-Berlin (Monophonic Synchronized Synthesizer) Arp Odyssey
-Chicago (Tube Bass Machine) TB-303
-Dublin (Monophonic Semi-Modular Synthesizer) MS-20
-Phoenix (Polyphonic Analog Synthesizer) OB-8
-Wolfsburg (Hybrid Polyphonic Synthesizer) An original? Probably sampled Moog and Prophet waveforms but I haven't tested it.
-Helsinki (Polyphonic Ambient Synthesizer) Original? Should be called a multiband synthesizer.
-Brussels (Monophonic Anthem Synthesizer) Hive? Should be called a unison synth.
-Miami (Monophonic Wobble Synthesizer) Massive, barely. Really just a cross mod synth.

As you can see half of the engines are subtractive based.
It'd be cool to see some of the other Gadgets ported to Switch like the extra drum modules Recife and Bilbao.
Not too interested in the other synth modules besides Montpellier; the Mono/Poly Gadget.