Doctor Synth’s Favorite Free Instruments:
Virtual Instruments I run on all my DAWs
Please donate to the creators if you use their downloads.

2Gether Audio – Cheese Machine 2 – Solina string machine emulation
2Gether Audio – Ticky Clav 2 – Hohner Clavinet emulation
Brain Control – Tunefish v4 – lightweight virtual analog synth
Combo Model F – Farfisa Transistor Organ emulation
Cwitec TX16Wx CWITEC –  TX16Wx Software Sampler based on the Yamaha TX16W
Dexed – Yamaha DX7 emulation
Full Bucket – 20 synthesizers including emulations of vintage Korg instruments
Futucraft – Kairatune
Green Oak – Crystal – semi-modular softsynth with subtractive & FM Synthesis as well as granular synthesis and wavesequencing.
Can also import SoundFonts and morph programs.
Ichiro Toda – Synth 1 – Nord Lead 2 Emulation
(emulating a virtual analog synth – is this Inception synthesis?)
IK Multimedia – SampleTank 4 Custom Shop – Vintage Synth collection
Additional instruments are available for a fee.
IK Multimedia – Syntronik Free – Vintage Synth collection
Additional instruments are available for a fee.
Linplug – Free Alpha – wonderful synthesizer for dance sounds, very Novation-like
This appears to have been discontinued
Martin Lüder – PG8X – Roland JX-8P emulation
Helm Matthew Tytel – Helm
PureMagnetik – Expanse – Texture Generator
Sample Science Room Piano Sample Science – Room Piano
They have a large collection of “pay what you want” instruments for $1+
Spitfire Audio – Labs – several sample-based instruments
SQ8L – Ensoniq ESQ-1 emulation for Windows 32-bit only.
Development was abandoned several years ago but it’s still pretty cool.
Steinberg – Model-E – Moog Minimoog emulation, not very realistic by modern comparisons
Steinberg – Neon – basic analog synth – terrible by modern standards but this is the very first VST.
Surge Surge Synth Team – Surge – Winner of KVR’s Best Free Synth award in 2020.
Synergia Synergia – DKI Synergy emulation
TAL – Bassline – Roland SH101 emulation
TAL – Noisemaker – Roland Juno 6 emulation
U-He – Podolski – cpu-efficient virtual analog synthesizer
U-He – Triple Cheese – comb filter synthesizer
U-He – Tyrell N6 – a fun virtual synthesizer
U-He – Zebralette – lightweight version of the powerful Zebra 2 instrument
VCV Rack 2.06 VCV Rack 2 – modular synthesizer with free and paid modules
Big Bang Orchestra Vienna Symphonic Library – Big Bang Orchestra
Vital Audio – Vital spectral wavetable synth