DRONOS is a free software synthesizer developed by WOK. Available format(s): VST for Windows.
DRONOS is a drone sound generator plug-in that creates rich, smooth evolving tones with just one key press.
http://www.wokwave.com

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DreamStation DXi2 is a polyphonic analog synthesizer plugin based on DreamStation I.
DreamStation DXi2 utilizes the same techniques featured in the standalone version; physical models of analog circuits, mathematical reproduction of analog oscillators which makes DreamStation DXi2 acting just like real analog synthesizers. You can sweep the pitch smoothly from 20Hz to 20kHz and apply the pulse width modulation without any digital aliasing at all.
Features:
- Subtractive synthesis combined with FM synthesis.
- 3 oscillators, multimode self oscillating IIR filter, VCA, LFO, user EG for each voice.
- Available waveforms: sine, triangle, sawtooth, pulse, square, noise.
- Available filter types: 12dB/Octave Lowpass, Highpass, Bandpass, 24dB/Octave Lowpass and Formant.
- A maximum of 16 voices polyphony.
- Linear frequency modulation, Hard synchronization, Ring modulation, Distortion.
- Supported sampling rates: 11.025Khz, 22.05Khz, 44.1Khz, 48Khz and 96Khz.
- Supported digital audio resolution: 16 to 32bits.
- Internal calculating resolution: 32 bits (with 24bit mantissa).
http://www.audio-simulation.com/
Features:
- ADSR for volume.
- ADSR for filter with envelope tracking hi mix band mix.
- Cutoff and resonance.
- Uses 4 oscillators all with phase modulation depth/octave/tune.
- The oscillators has octave/tune and volume.
- You can choose between sine/saw/pulse/triangle/ramp.
- It has a filter crosser and a panner.
- Slicer/flanger/filter slicer and a BPM delay.
https://theodosynthsarchive.wordpress.com/
Dream Sequencer is for that sequencing sound of the 70’s as produced by Tangerine Dream, etc. The VSTi synchronizes with the host BPM and takes its root key from a “MIDI note” and plays for the duration from “note on” until “note off”. The pitch knobs are quantized to semitones with a range of one octave.
http://www.dream.vortex.btinternet.co.uk/
Features:
- 3 Dual oscillators with detune, 4 waveshapes, pulse width, sync, FM.
- Sub-oscillator.
- Noise generator.
- 3 LFOs with attack, 5 waveshapes, pulse width, sync to host tempo and restart.
- 3 Assignable envelopes with invert.
- Each LFO and envelope can modulate 24 parameters simultaneously.
- Modulation wheel and velocity that can modulate 33 parameters simultaneously.
- 2 Multimode filters with pre-filter overdrive and keyboard tracking.
- Filter link option for cut-off and resonance controls.
- Filter mix options are filter 1, parallel (with parallel mix control) and series.
- Dedicated filter envelope with invert.
- Option to send either or both of the filters to the filter envelope.
- Audio frequency modulation of the amp envelope.
- 6-Note polyphonic/monophonic (retrigger/legato).
- Portamento.
- Pan.
- Midi learn for all knobs except the LFO/env and mod wheel/velocity destination amounts.
- PDF user manual.
http://www.boxsounds.com/
Features:
- 2 Phase Distortion Oscillators with dedicated amplitude and Phase ADSRs.
- 2 FM Operators – modulators with 80+ waveforms and non-bandlimited carrier oscillators with dedicated amplitude and FM ADSRs.
- Noise Generator.
- 2 Moog style Low Pass Filters, both with dedicated modulation ADSRs and LFOs (synced to host tempo), and effect on/bypass.
- Warm Shape and Clip Distortion.
- 3 Poly/Mono Voice Stealing Modes.
- Oversampling up to 32x.
- Internal preset manager with 146 factory presets.
http://trapdooraudio.com
Double Six XXL is a 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.
Features:
- 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.
- Every operator has its own envelope. You can choose between 1 and 8 stages and set the sustain point from 1 to 7 or off.
- Every operator has a clipper, overdrive, lowpass filter and a distortion.
- 2 octave sequencers with Destinations operator 1 to 6.
- 4 envelopes with retrigger mode on BPM rates.
- 3 LFOs with 19 different waveforms with 16 different BPM rates and free rate (manual) mode. Destinations of the LFOs are pitch operator 1 to 6, phase modulation 1 to 6 and cutoff.
- The LFOs can start free (any point of the LFO waveform), gated starts when you hit a key or first (starts when you hit play in the sequencer).
- An octave pitch.
- 14 different curves for the envelopes. All envelopes have a time knob. You can switch between the envelope and volume.
- The operators can be disabled, fixed or pitched and have a octave range from -6 to 3, fine-tune and pulse width.
- 11 different waveforms for the operators.
- The filter has the same envelope and there are 10 different filters types low-pass 12db, low-pass 24db, low-pass db32, hi-pass, band-pass, CK low pass, CK Band pass, CK hi pass, CK notch and CK peak.
- Volume envelope.
- EZ preset: This allows you make new sounds fast. You can reset all fine-tunes with the hit of a button or change all waveforms, set all the octaves the same and the times of the envelopes.
- Phase modulation depth control and a feedback control.
- Volume envelope.
- Note sequencer.
- Build in effects are Chorus, stereo delay, gater, clipper, overdrive, distortion and phaser effects.
- Velocity controls.
- Voice/poly control.
https://theodosynthsarchive.wordpress.com/
Double Six is a 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.
Features:
- 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.
- Every operator has its own envelope. You can choose between 1 and 8 stages and set the sustain point from 1 to 7 or off.
- Every operator has a clipper.
- 2 octave sequencers.
- 3 envelopes with retrigger mode on BPM rates.
- 3 LFOs with 19 different waveforms with 16 different BPM speeds and free rate mode.
- 14 different curves for the envelopes. You can disable the envelope to save some CPU. All envelopes have a time knob.
- The operators can be disabled, fixed or pitched and have a octave range from -6 to 3, fine-tune and pulse width.
- 11 different waveforms for the operators.
- The filter has the same envelope and there are 5 different filters types (low-pass 12db / low-pass 24db / low-pass db32 / hi-pass / band-pass).
- EZ preset: This allows you make new sounds fast. You can reset all fine-tunes with the hit of a button or change all waveforms, set all the octaves the same and the times of the envelopes.
- Phase modulation depth control and a feedback control
- Master and volume envelopes.
- One BPM LFO for PMD operator 1 to 6, pitch 1 to 6 and cutoff.
- Chorus, stereo delay, gater and phaser effects.
- MIDI Learn.
- 128 preset + 32 made by Cuppa.
https://theodosynthsarchive.wordpress.com/
Programmed from the ground up to CM’s own specifications, Dominator takes the venerable sound of classic analogue synths and beefs it up with modern routing, modulation and waveshaping options.
Features:
Triple Oscillators
- Three oscillators per voice with a choice of six waveforms (Saw, Pulse, Sine, Triangle, Sync Saw, Sync Pulse).
- Pulse width modulation per voice and coarse (4 octave range) and fine tuning adjustments.
Oscillator Control
- Dedicated LFO to control vibrato depth and pulse width modulation.
- Glide time setting and mod wheel vibrato depth control.
- Analog control for adding fat analogue-style detuning.
Voice Control
- Four voice modes (monophonic, polyphonic, unison and chord mode).
- Unison with 2, 6 or 12 voices.
- Chord mode with 5 user-definable intervals (plus root note) for building up complex chords to be triggered from a single key.
- 6 play modes for mono/unison/chord, for controlling when glide should be applied and when envelopes should be reset.
- Smart mode for handling successive presses of the same key, or Reset mode, where all envelopes and oscillators are reset for each note, for a punchier sound.
Mixer
- Independent levels for each oscillator.
- Noise and ring modulation (between oscillators B and C) can also be mixed in.
- An external input signal can be mixed in on the VST effect version (this is mixed into each voice).
Amplitude Envelope
- Classic ADSR envelope with velocity sensitivity.
- Optional ‘Warm’ VCA mode gives a non-linear analogue-style response.
FX
- Chorus modeled on the classic Roland Juno chorus, with depth and rate controls.
Dual Filters
- Two fat multimode Moog-style filters per voice, with 5 filter types (lowpass 12/24dB, bandpass 12/24dB and highpass 12dB).
- Filters can be overdriven and can be made to self-oscillate, just like true analogue filters.
- Keytrack, velocity and filter envelope can all be used to modulate the cutoff frequency.
- Optional ‘Warm’ mode drives filter harder to add more oomph and body.
Filter Envelope
- The classic ADSR envelope for modulating cutoff of the filters.
Waveshaping
- Optional waveshaper per voice with five different modes and drive control (goes up to 11).
- Transistor, diode, hard clip, sine and rectifier shaping modes.
Routing
- Waveshaper and the two filters can be configured in five different arrangements, including serial and parallel configurations, for flexibility.
LFO
- LFO with sine, triangle, square, positive-only square, sample and hold and noise shapes.
- Can modulate amplitude, oscillator pitch B, oscillator pitch C, filter A and filter B.
Modulation Envelope
- ADSR envelope to modulate filter B, pulse width modulation, vibrato depth, oscillator pitch B, oscillator pitch C and noise level.
http://www.computermusic.co.uk/