VST PLUGINS FOR FREE Get producing music straight away with free VST plug-ins and samples in KOMPLETE START, taken from our leading production suite, KOMPLETE.Get REAKTOR PLAYER, KONTAKT PLAYER, KOMPLETE KONTROL, free effects VST plug-ins, free synth plug-ins, and sampled instruments to use in your own productions, as much as you want. Era II is the best VST for Medieval and European folk instruments by far. As I recall, it includes excellent, true legato samples of all the instruments you mention and then some. There is also a fantastic vocal library add on including tavern singers and female voice by Celica Soldream! Nvm, I just saw you're looking for freeware.
The Theremin !
One of the very first electronic instrument, invented by the Russian physicist and cellist Leon Theremin in 1919.
Download FREE Whistle sounds - royalty-free! Find the Whistle sound you are looking for in seconds. Note: Free Kontakt Player will only work for 30 minutes with this product. Full version required to remove this restriction. Kontakt 4 runs as a stand-alone application, VST® or Audio Units plug-in, RTAS® under Pro Tools 7/8.
Everybody knows this instrument that you can play without physical contact. The Theremin produces a tone that changes in pitch and dynamic level when the player moves his hands near its antenna and loop.
It’s often associated with 50’s sci-fi movies, furious aliens and creepy/spooky creatures and was also used by many artists, just to name a few :
Beach boys – Good Vibrations !
Portishead – Mysterons
Goldfrapp – Yes Sir
+ Radiohead, Led Zep, Massive Attack, Pink Floyd, Julien Dragoul and many more !
If you search the perfect VST for this landing spaceship sound here’s a selection of free VSTi that tries to emulate the good old Theremin :
1. Spook Keys by Simple Media
Spook Keys VST
Download : http://www.simple-media.co.uk/vsti.htm
This is the best Theremin VST emulation, and it’s free !
Drag the light point on the amplitude / frequency axes : instant Theremin action ! Here come the flying saucers. You can also play MIDI notes with your keyboard.
You have 4 waveforms to choose from so there is more than the Theremin sound, check out the presets !
Delay is simple but effective.
Depth and Rate parameters are for the vibrato.
Alien invasion, they are coming
https://blog.wavosaur.com/wp-content/uploads/2014/06/spook-keyz.mp3
2. BTS Super Theremin
Download it => here
This synth can do a decent Theremin emulation, add some reverb and/or delay after and you’ve got a nice clean gliding sinus Thereminesque sound. The perfect VST for science fiction movies!
BTS Theremin VST + cathedral reverb for more romantic SCI FI sound
https://blog.wavosaur.com/wp-content/uploads/2014/06/BTS-theremin.mp3
3. 666 VST by Eloxoga
the number of the beast
666
Click on the button, and drag the skull : a demonic Theremin from hell will scream.
Perfect for horror ambience or invoking the devil.
4. Mysteron by FXPansion
Download : https://web.archive.org/web/20050623003606/http://www.fxpansion.com/skunk/
Drag the little cross or use you MIDI keyboard.
Vst plugin diva x64. This one is very simple, you may need to add a delay / reverb effect after.

5. Bluenoise Theremin
Bluenoise Theremin
Download for free here : http://www.bluenoiseplugins.com/plugins/free-plugins/
This one is funny, with the hand you can drag.
The range for the vibrato depth is not well calibrated, only the 3 first positions are really usable for Theremin emulation.
The signal is a sinus when you turn the “age” parameter to the maximum
Note that you have to send MIDI message.
Spooky Creepy Scary Funky Science Fiction SFX
https://blog.wavosaur.com/wp-content/uploads/2014/06/bluenoise-theremin.mp3
6. Super Spook Keys
Free download : http://www.simple-media.co.uk/vsti.htm
Trap Whistle Sound Kit Free
A slightly different version of Spook Keys.
A great VST for classic sci fi sound FX.
7. Enigmatron VST by FXPansion
Enigmatron VST
Direct DL : espace Cubase
This is a customized version of the Mysteron Theremin VST.
8. TerVoxSyn VST by Chris Roberson
Freeware download : http://robersonaudio.tk/tervoxsyn/
This free VST is worth mentionning too. It has a nice “voicy” sound.
Set the timbre to zero for a more “Theremin” sound
Our library is a new generation of Irish Low Whistle with incredible playability and realism. Low Whistle was created with legato techniques. The low whistle, or concert whistle, is a variation of the traditional tin whistle/pennywhistle, distinguished by its lower pitch and larger size. It is increasingly accepted as a feature of Irish traditional music. In both kinds of music the low whistle is often used for the playing of airs and slow melodies due to its haunting sound. However, it is also becoming used more often for the playing of Irish jigs, reels and hornpipes, it being easier to produce some ornametations on the whistle, due to the size of the finger holes. The most common low whistle is the 'Low D'.
Free Whistle Vst
The Irish Low Whistle library is a highly playable instrument based on a highly playable legato system. We sampled all possible intervals in several versions. Thus, you get all-natural realistic legato.You have full control over dynamics and expression, able to add and control vibrato and frullato. At your disposal is a variety of articulations: mordent, grace note (forshlag), slides, staccato and rolls. Additionally, we have introduced a unique system of articulation switching. The library also contains additional useful features such as Repetition Key and Attack mode. You can reassign keyswitches and midi controllers, saving all settings on your computer