Acquit Music
HITxx
HITxx by Acquit Music is a free Frequency Modulation synthesizer plugin for Windows in VST2 format.
VST2Synths
Instruments, effects, and hidden gems
Free plugins: Instruments
Browse 1072 reviewed free instrument plugins for Windows, with compatibility and installation details.
2140reviewed plugins
79%install-ready
Top 5category ranks
40sound categories
All categoriesDrum kits · 29Drum synths · 14Drum machines · 9Single drums · 27Groove / sequencers · 10Percussion · 30Drums · 30Guitar & bass · 28Piano & keys · 79Brass & wind · 44Folk & ethnic · 53Orchestral · 24Samplers · 52Loop & scratch · 12Synths · 587Organs · 30
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1072 plugins
Every reviewed plugin matching the current filters.
GTG
GTG FM 4
GTG FM 4 is a compact and user-friendly FM synthesizer featuring three operators with dual mixable signal paths, allowing for versatile sound creation on Windows 32-bit VST hosts.
VST2Synths
SynthIV
GSS-370
GSS-370 is an approximate emulation of the Yamaha PSS-370 synthesizer with added circuit-bending effects, available as a free 32-bit VST plugin for Windows.
VST2Synths
Wollo
FMera
FMera is a 32-voice polyphonic synthesizer combining FM synthesis with a wave player. It features two oscillators per voice and includes a female voice sample triggered with the FM sound.
VST2Synths
ToneBytes
FM-Four
FM-Four is a free VST2 synthesizer plugin for Windows that emulates 4-operator FM synthesis with eight algorithms and multiple waveforms to create rich, harmonic timbres.
VST2Synths
easytoolz
easy-fm
easy-fm by easytoolz is a 4 operator FM synthesizer with contour and resonance controls, dual ADSR envelopes, an 8-step sequencer, and six waveforms for versatile sound design.
VST2Synths
Odosynths
DoubleSix
DoubleSix is a free 6-operator FM synthesizer plugin featuring 32 DX7 and 16 4-operator algorithms. Each operator includes a customizable envelope with up to 8 stages and selectable sustain points.
VST2Synths
Hinton and Fairchild
Donk Machine
Donk Machine is a free FM synthesizer plugin by Hinton and Fairchild designed to create the classic Donk sound popular in Deep, Bouncy, and Spanish House as well as Russian Pumping genres. It features 5 oscillators, smooth reverb, filters, and EQ with distortion for versatile sound shaping.
VST2Synths
Opulent Audio
DirtyGirl
DirtyGirl by Opulent Audio is a PWM synthesizer featuring dual SE oscillators with FM and PWM capabilities, two SV filters, dirt, grains, reverb effects, versatile modulation, and an arpeggiator. Supports mono/poly modes.
VST2Synths
Jasper Vermorgen
DigiReactor
DigiReactor by Jasper Vermorgen is a Windows-only FM synthesizer featuring three oscillators, two LFOs, three envelopes, and an array of built-in effects including reverb and delay.
VST2Synths
KBplugs
tonus Little Wing
tonus Little Wing by KBplugs is a free VST2 modular synthesizer plugin for Windows inspired by the ARP 2500’s design. It delivers a nod to the classic hardware with no presets included.
VST2Synths
KBplugs
The Dodeca 258c
The Dodeca 258c by KBplugs is a free Buchla Dodeca inspired synthesizer emulation for Windows 32-bit VST2 hosts.
VST2Synths
KBplugs
System One E
System One E by KBplugs is a free Buchla modular inspired synthesizer emulation for Windows 32-bit.
VST2Synths
KBplugs
System One D
System One D by KBplugs is a free Buchla modular-inspired synthesizer VST2 plugin for Windows x86, offering unique modular synthesis without presets.
VST2Synths
KX77FREE
SE PolyMod KX
SE PolyMod KX by KX77FREE is a vintage polyphonic semi-modular synthesizer featuring up to 4 voices, oversampling up to 4x, stereo routing, and a 12x12 modulation matrix with 8 KXMOD modulations.
VST2Synths
TheWaveWarden
Odin
Odin is a 12 voice polyphonic wavetable subtractive semi-modular synthesizer featuring aliasing-preventive oscillators and virtual analog Moog-ladder and Oberheim filter emulations.
VST2Synths
MVX Synths
MVM
MVM by MVX Synths is a free multioscillator synthesizer with extensive routing and modulation capabilities designed for complex sound design on Windows 32-bit.
VST2Synths
Full Bucket Music
ModulAir
ModulAir by Full Bucket Music is a free polyphonic modular synthesizer offering up to 18 modules per patch and 64 voices of polyphony for rich sound design.
VST2Synths
The free-plugin pulseUpdated Aug 23, 2026
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