All are free - download the plugins here :
ln.sync.com/dl/62c9b9f70/bbjdawxt-cu57as74-uwgfww69-q3tygvzs
To download only the VSTs themselves, download the "_dlls only" folder :
ln.sync.com/dl/74a155ac0/dk8nnavk-x9jy5b6z-xkznfvcp-hutv2fzm
The individual foiders within the main folder also contain the actual Synthmaker schematic files (.osm), screenshots and in many cases the owner's manuals for the hardware synth the plugin was inspired by.

For those who don't have a Digital Audio Workstation or any kind of plugin host on their computer, and are just curious and would like to play around with these, I highly recommend Hermann Seib's free little applet, vstHost available here:
www.hermannseib.com/english/vsthost.htm
You won't even need a MIDI keyboard connected to your computer.

The plugs are 32-bit, Windows-only; they cannot be made Mac-compatible because they were made with Synthmaker, which doesn't support it; nor it's current version, Flowstone (they're working on it).  www.dsprobotics.com/flowstone.html
To use these on a 64-bit system, there's jBridge : jstuff.wordpress.com/jbridge/
and 32Lives : www.soundradix.com/products/32-lives/
Picture
PB-Mx
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maGGi
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theKwad
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Skematic4
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T-forTwo
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CROMA flexPatch
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Yumaha CS-75M g
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Yumaha CS-15 +
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Yumaha CS-30 +
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Voyette SPT
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copperOdy II
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copperOdy_cables
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Mk-5600
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The PUTNIE v1.03
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Juan, Oh Juan
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minDy_v1.01
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minDy S
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spirit of Spirit v1.01
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evol-Vox
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gM-32
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copperHead
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copperHead_2602
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tonus Nineteen70
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S-One
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Banquo
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Synthe-System_plus
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PolyStep II
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Mx-Jr v1.01
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The Music Weasel
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200 Max
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DodecaMax
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200 M
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Skylab OS
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200 C
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The Dodeca 258
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The DodecaPlex
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SystemOne G
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Chorg 770
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Chorg 770stick
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Chorg PS-3500
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Chorg 870 DV
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OB-2
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PulOddy
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maGGi 70
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IMIJ
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Skematic6
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Chorg Pano/Poly
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CS-gx
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Four On Two
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the simpleShruth
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simpleONE_v1.01
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A 3.5
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ElektroComp 102
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ElektroComp 1301
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Yumaha CS-153
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Yumaha CS-153_stick
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PPG 1022 v1.01
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Synthegrated 35A
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M-5600
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Obie 2V v1.01
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TwoPro
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TwoSEM_stick v1.01
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Tone Boardz v1.01
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Dark Two
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Dark Thee-stick
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Dark Steps
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Dark Four
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tonus 2813
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tonus 2620
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DX Won
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tonus Pro Colorist
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Rolend PG-238 v1.01
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Chorg DS-600
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Zoomchak
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ZoomChak pro
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ZoomChak pro II
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minimodular
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Synthy P
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Rolend SH-3p
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Rolend SH-1200
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Rolend SH-12
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Rolend SH-57
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Rolend SH-75
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Obie-12
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'M'
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Cronus
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Super 35
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KrossWave, powered by 'Quilcom'
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RevToo
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SkematicGS
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Six-Stack
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Krumar DS-3 +
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Throttle
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Cassini_M
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Ele-mints
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Slab 4
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SV-Two
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Polly v1.01
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Chorg PS-20
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Chorg PS-20a
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Auditie
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SynKie
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Sub 88
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SubStick
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Multipoly v1.01
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DualMulti_Stick
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twoBYthree
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CyRinx v1.01
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Matrix-Six1 v1.01
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eXpando II
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EML 500
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the KAT/stick
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mOdyCat
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CS-358
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Rolend System 101 M
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Rolend System 101M_stick
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Rolend System 101Max
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Rolend System 500p
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tonus Explorer AT+
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Nebula-K
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OdyPatch
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Rolend Block-8_cables
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Rolend Block-1
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tableBlend
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b6
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ZMZ 2000
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Sovereign I
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Syntha-kon
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Luge
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Rolend noSoupRsaw