ANS

Optical soviet synthesizer. 


Virtual ANS is a software simulator of the unique Russian synthesizer ANS - photoelectronic microtonal/spectral musical instrument created by Russian engineer Evgeny Murzin from 1938 to 1958. Murzin named his invention in honour of the composer Alexander Nikolayevich Scriabin.
The instrument was used by Stanislav Kreichi, Alfred Schnittke, Edison Denisov, Sofia Gubaidulina, Edward Artemiev and other Soviet composers.
You can hear the sound of the ANS in Andrei Tarkovsky's movies Solaris, The Mirror, Stalker.
In 2004, the British experimental group Coil released CoilANS, a boxed set of experimental drone music performed on the ANS. 

http://warmplace.ru/soft/ans/

 

HGF

HGFortune NFG (Nearly Forgotten Gems) Pro versions now free!
Plus some more freebies!
http://www.hgf-synthesizer.com/nfg---pro-vsti-free.html

Xenobioz Kruudster

Kruudster is a free Hybrid Synthesizer VST instrument plug-in for Windows with drawable low resolution waveforms

http://www.xenobioz.com/

Giada

Giada is a free, minimal, hardcore audio tool for DJs, live performers and electronic musicians. How does it work? Just pick up your channel, fill it with samples or MIDI events and start the show by using this tiny piece of software as a loop machine, drum machine, sequencer, live sampler or yet as a plugin/effect host.


http://www.giadamusic.com/

free musicians resource

http://www.freemusiciansresource.com/
Free VSTs, plug-ins and software for recording home musicians