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Oke got this from a magazine, just some softsynths (not just VSTsynths) sorted on their form of synthesis. I found it quite intersting. 
Text taken from DIGITAL MUSIC MAKER MAGAZINE SE: SYNTHESIS
ANALOG & MODULAR ANALOG
Beginning the process of imitating analog synthesizers in software is simply a matter of creating simple wave files - such as sines, sawtooths and squares – although filtering and processing them in a way which sounds as smooth as a genuine analog instrument can be a real challenge.
Since many of the classic synths of yesterday were analog, specific software imitations of hardware instruments are common. Some software imitations are more true to the original than others, sometimes simply for copyright reasons.
EXAMPLES:
Access Virus Indigo TDM for TC Powercore hardware
Arturia CS-80V (Yamaha CS 80 modulation)
Arturia Minimoog V (MiniMoog emulation)
Arturia Moog Modular V (Moog Modular System emulation)
Discodsp Discovery v2.1 (Clavia Nord Lead, roughly)
E-Magic ES1 & ES2 in Logic
G-Force ImpOSCar (polyphonic OSC OSCar emulation)
G-Force Oddity (ARP Odyssey emulation)
Korg Legacy MS-20 (polyphonic MS-20 emulation)
Korg Legacy Polysix (Korg Poly 6 emulation)
Linplug Albino 2
Native Instruments Pro53 (Sequential Prophet 5 emulation)
Novation Bass Station
Novation V-station
Nusofting Mothership Astrobelt
Propellerheads Subtractor in Reason
ReFX Vanguard (replaces Juno X2, a Roland Juno 106 imitator)
Steinberg JX16
Steinberg Model-E (MiniMoog-a-like)
TC Works Mercury 1
SAMPLOID
The trend among keyboards and modules over the last few years has been towards samploid designs – in other words, sounds are based on sampled waveforms which are then processed. So far, there are relatively few samploid software packages, but numbers are increasing.
EXAMPLES:
Spectrasonics Atmosphere
Steinberg Hypersonic
ROLAND TB-303 Style
The Roland TB-303 Bassline was one of the first synths to make the transition to software imitation, probably because it made a fairly simple sound, but the hardware version has become much sought-after and expensive on the second-hand market. There are many shareware and even freeware imitators in addition to the examples mentioned below.
EXAMPLES:
Propellerheads ReBirth RB338
Steinberg Neon
MODULAR
These synths allow virtual patching of different elements, so the user can create a unique voice in software – not to be confused with modular analog systems, which offer patchable alignments of relatively simple modules. One other software modular, the powerful Clavia Nord Modular, runs only on its own associated hardware.
EXAMPLES:
Applied Acoustic Systems Tassman 4
Software Technology Vaz Modular
VirSyn TERA 2
FM
Frequency Modulation synthesis was the method developed by Yamaha for its DX range of keyboard modules. Several software packages offer a limited form of FM synthesis, but there seems to be only one licensed imitation of the actual algorithms which make FM controllable and musically meaningful
EXAMPLE:
Native Instruments FM7
WAVETABLE
This is one of the most interesting forms of synthesis, offering digital waveshapes (which can include simple imitations of analog waves) that can either be filtered, or stepped through in wavetables during the course of a note. This can create everything from analog imitations to complex cycling sounds.
EXAMPLES:
Korg Legacy Wavestation
Shinen SHN-1
Steinberg Waldorf PPG2V (PPG Wave 2)
GRANULAR
Granular synthesis is a rare technique which can create anything from smooth to gritty and distorted sounds.
EXAMPLES:
Pluggo Cycling ‘74
Propellerheads Malström in Reason 2.5
Rasmus Ekman Granulab
ADDITIVE
Another rarely seen form of synthesis, which cropped up in hardware on the Kawai K5/K5R, the Kawai K5000S/W/M, the expensive NED Synclavier and Fairlight, and in limited form on the Korg DSS1/DSM1. Theoretically, it’s based on adding many sine waves at different pitches (usually 64 or 128) under the control of individual envelopes, though some software versions also bend pitches or, like VirSyn Cube, morph from one set of waves to another.
EXAMPLES:
Camel Audio Cameleon 5000
ConcreteFX Adder
Discodsp Vertigo
Symbolic Sound Kyma, an expensive hardware/software resynthesizer
VirSyn Cube
PHYSICAL MODELLING
Seen in hardware synths such as the Yamaha VL1 and VL70M, the Korg Prophecy and Z1 and the Technics WSA1, this processor-hungry synthesis method holds mathematical models of the response of the strings, pipes, drumheads and other instrument parts, and allows users to combine them to create authentically acoustic sounding hybrid instruments, the likes of which have never existed before. Physical modelling can be a complex process – but Tassman 3, for instance, holds 50 different physical models and 1000 presets just for starters, making it an ideal first choice.
EXAMPLES:
Steinberg Flex
Synapse Audio Plucked String
Zero-G Vocaloid
PERCUSSION
There are many software drum machines on the market, some even offering enough variation of sound to qualify as percussion synthesizers. Below are some of the best.
EXAMPLES:
FXPansion DR008, and BFD acoustic drum module
Native Instruments Battery
Sonic Charge Utonic
Steinberg Waldorf Attack
Swar Systems SwarPlug (Indian Percussion)
LOOPING/SLICING
There’s a lot of software on the market dedicated to the creation of loops and beats from various sound sources. Most of these have plenty of sound-processing ability, so could be regarded as synthesizers, having something sonically in common with the wavetable types.
EXAMPLES:
Bitshift Audio pHATmatik Pro
Image Line FL Studio
Steinberg Xphraze
VINTAGE
The imitation of classic electro-mechanical keyboards. However it’s done – using any combination of additive synthesis, sampling or digital signal processing – the intention is to specifically replace the sounds named (and often very large, expensive and unreliable) classic keyboard instruments.
EXAMPLES:
AAS Lounge Lizard (Fender Rhodes and other electric pianos)
E-Magic EVB3 (Hammond) and EVD6 (Clavinet) in Logic
Gforce M-Tron/Megatron (Streetley Electronics Mellotron emulation)
Native Instruments B4 (Classic Hammond hardware emulation)
Scarbee WEP (Wurtilzer electic piano library)
UVI Charlie (Hammond B3, Elka and other organs)
edit: I have never completely read this thread os if something similar has been posted already, just ignore my post 
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