Free VSTI - Crisalys

Developer: Max Synths

From the developers website:

“Crisalys is a software synthesizer characterized by a powerful audio engine which can work up to 192Khz. The three oscillators are driven by custom waveforms designed specifically to grant top quality sound in any situation. Each oscillator has built-in FM, Ring Modulator and Cross Modulation options controlled by three separate internal LFOs. The Ring Modulator can achieve sound characteristics that can go beyond the common sonorities of this effect, thanks to an internal custom circuit which has been developed for this purpose.
The audio path continues through two multifilters which can operate as state variable filters, analog emulations or in EQ mode. The modulation section offers, in addition to the classic controls (modulation wheel, aftertouch, velocity, etc.), four LFOs, two aux envelopes and two step LFOs which can be used as modulation sources to create atmospheric pads, control the filters, create rhythmic sequences and so on. Each LFO has a special "Quantize" control which can be used to introduce a small (or huge, if turned fully clockwise) variation to the LFO wave and sync speed. Used on pads this can produce interesting effects, adding some granulosity to the sound.”

Get it here:

http://www.maxsynths.com/vsti_crisalys.html

Free VSTI - 4 Tune

Developer: Noizefield Instruments

From the Developers site:

"Short Description:
4 Tune is a modern softsynth with a bunch of presets, much of them are similar to hit-sounds from famous artists. 4 Tune is based on subtractive synthesis for EDM, House, Dance, Trance, Dub, Trap and other styles of electronic music. In the following are more details:
Featurelist of 4 Tune:
4 equal oscillators with 58 waveforms each, inclusive PWM, FM and RM
2 Multimode-Filter
1 Noisegenerator (White Noise/ Pink Noise)
1 Modulatiosmatrix
2 Envelopes (1 Amp-, and two Modulationsenvelopes)
4 tempo-synced LFOs
1 Chorus"

Get it here:
http://www.noizefield.com/products/4-tune

Free VSTI - BTS Theremin

Developer: Blechturm Studios

Cool free Theremin instrument with a decent amount of parameters to tweak.

To get a more realistic Theremin sound, consider mapping volume, LFO depth, volume and pitch to  the faders and mod wheel of your midi keyboard.

From the developers website:
“1 OSC (Sin/Squ)
2 LFOs (Pitch,Amp)

2 ADSR (1x Pitch LFO, 1x Amp)

Waveshaper/Saturation

10 Presets”



Get it here:
http://blechturmstudios.at/index.php?option=com_content&task=view&id=14&Itemid=30

Free VSTI - T-Force Alpha Plus

Developer: Mastrcode Music

Great free vst instrument for trance music (and other genres).
From the developers website:
"Alpha Plus is the advanced version of the T-Force Alpha TS. It has all features of the Alpha TS with some more and some updated functions: new sythesis (Subtractive and additionally FM Synthesis),revised oscillators with some more functions and now with a separate noise oscillator, new Mod Envelopes and now with a new integrated Sidechain FX (e.g. for the typicyal sidechained pad sounds and/or pumping basses etc.).
Specifications:
Synthesis: Subtractive/FM.
3 Multiwave Oscillators with voice control (adjustable from 1 to 8 voices per osc or a 9th "custom" voice for customizing Your own style multi oscillator), adjustable stereo width and panning, with Sine, Saw, Ramp (reversed Saw), Triangle, Pulse (square with PWM) waveforms and retrigger option for each oscillator (with "retrigger off" the oscillator is in free running mode, the oscillatorstarts with random phase positions everytime played a note, with "retrigger on" the oscillator'sphase starts from position 0 everytime played a note.
1 Noise Oscillator with adjustable stereo width and volume.
1 Resonance Four Pole State Variable Filter, switchable between Low Pass, High Pass, Bandpass and switchable 12/24 dB slope, Resonance can be driven up to self oscillation.
1 ADSR Filter Envelope.
1 ADSR Amp Envelope.
2 ADSR Mod Envelopes.
2 host syncable LFOs.
Adjustable Drive function for Saturation/Distortion.
two band Low Freq/High Freq Equalizer.
Bitcrusher.
Portamento.
32 step Envelope Controlled Trance Gate.
Velocity control (on/off).
Dual Delay, switchable between Stereo mode and Ping-pong mode (right and left channels have their own tempo settings).
Stereo Reverb.
integrated Sidechain FX, optional with internal bpm synced triggering or external triggering via MIDI In (triggered by MIDI Note On, on MIDI channel 2). Note: see the manual of Your DAW for informations how to route a second MIDI Track to a VST/VSTi, because some DAW's have different ways of MIDI routing.
MIDI Learn (by right clicking a control)
all functions fully automatable."

Get it here:
 http://www.mastrcode-music-vst.com/main.php?cat=8