Xen-Arts Xen-FMTS 2

Xen-Arts has released Xen-FMTS 2 – a free microtonal synthesizer for Windows.

Xen-FMTS 2 is a 4 Operator FM Synthesis VSTi with a specialized set of features for computer musicians interested in exploring the possibilities of making music with alternative intonation systems

It is a freeware 32-bit plugin instrument for Windows that includes 115 patches, 55 microtunings and 56 partials files.

http://www.xen-arts.com/2014/02/xen-arts-virtual-instrument.html

Odo DreamDrums

DreamDrums is freeware and not a 808 or 909 ect.But it can be close to the 606 and 808.Still i hope you like it and want to help me with a better GUI and or presets.Ideas are always welcome.One thing for the noise if you use a lot of tone you will not hear the pitch of the noise so turn that down.For the first time i like a drum plug i made Hope will be even better.

http://www.kvraudio.com/forum/viewtopic.php?f=1&t=403458

Brainstormer

Roazhon DSP has released BrainStormer, a freeware virtual analogue synthesizer (with FM and ring modulation capabilities). 
The sound of BrainStormer reminds me of the legendary Synth1 in the sense that it doesn’t try to sound too analogue or vintage. It is simply a decent sounding VA synthesizer with a good set of filters and standard oscillators, paired up with x2 oversampling to enhance the sound. No more, no less. What I loved about this synthesizer, though, was the easy workflow and the look and feel of a solid and well thought-out software instrument.

http://roazhondsp.storm-mastering.com/

Moto Q free

Moto Q is a parametric equalizer featuring 11 filter slots which include standard LP/HP filters, low and high band shelves, two notch filters and five parametric bands. The interface also features a handy spectrogram display which enables monitoring of the frequency spectrum in real time.

http://axisplugins.com/download/Moto_Q_Free

Pitchproof

PITCHPROOF - PITCH SHIFTER | HARMONIZER

Pitchproof is an audio plug-in that can shift the pitch of the input. The effect is meant to combine old styles of pitch shifting with the quality you expect from modern plug-ins. The result is this pitch "pedal" simulation that has most of what is great about guitar harmonizer pedals, and still preserves the signal's integrity.

http://aegeanmusic.com/pitchproof-specs

VB cable

VB-Audio CABLE is a Windows Audio Driver working as Virtual Audio Cable.

http://vb-audio.pagesperso-orange.fr/Cable/index.htm

Polyphone

Soundfont editor

Polyphone is a free software for editing soundfonts in format sf2. These files contain a multitude of audio samples put together and configured so as to form musical instruments that can be used by synthesizers such as fluidsynth and played using a MIDI keyboard.

The goal of Polyphone is to provide:
a simple and efficient interface for creating and editing .sf2 files, available on Windows, Mac OS X and Linux,
tools to facilitate and automate the editing of different parameters, making it possible to handle a large amount of data.

http://polyphone.fr/

Ring Modulator

MUSICALLY USEFUL RING MODULATOR?
Yes. The RM 101 is a re-creation of a classic effects chain using a vintage ring modulator. However, unless you are handy with a soldering iron, have access to an old transistor ring modulator, an old dual channel tube amp, an old tube echo unit, a 2-pole ladder filter, and an old chorus/flanger pedal, you will not have much luck capturing the tone of the RM 101.

http://www.vstplugin-sonicxtc.com/freebies

Scalefreq Generator

Scalefreq Generator is a tool for rendering frequencies of notes / musical scales into various output formats. It’s primarily aimed for mixing/mastering engineers and other musical interested people. The frequencies of musical scale or non-scale notes (inverse) are important in mixing and mastering situations. E.g. non-scale frequencies are often attenuated using an EQ.

Scalefreq consists of a core system, a render-plugin architecture and a graphical frontend for convenient user interaction.

http://blog.airmann.de/scalefreq-generator-v1-0/

Pitchd

PITCHD is a delay plugin with a pitch-shifter in the delay path.

Pitch shift amount can be adjusted in semitones or fine. Delay can be set in milliseconds or host synced. Can be used as send or insert effect.

Let the echo’s pitch drift away softly with a slight detune or up or down by a maximum of one octave to create strange effects.

http://music.service-1.de/html/wok_free_vst_plugin_pitch_shif.html

Fracture

GlitchMachines Fracture

Fracture features a buffer effect, a multimode filter, three LFOs and a delay. This plugin is geared toward adding glitchy articulations and abstract textures to your projects. Use it on anything from drum and percussion loops to synth lines and sound effects. Fracture’s intuitive interface and diverse features make it simple to give your projects a unique technical edge.
http://www.glitchmachines.com/downloads/fracture/

retro boy

Retro Boy is a virtual analog chiptune synth/emulator. Chiptune or otherwise known as 8-bit music is music or sounds synthesized by the sound chip of computers, video game systems, and most handled gaming systems. Retro Boy features a single oscillator that has seven waveshapes: 12.5% pulse, 25% pulse, %50 pulse, saw, triangle, sine, and noise.

http://www.sbaudio.org/retro-boy

futucraft kairatune

Kairatune is designed to produce crisp and tight electric sounds for electronic music production

Kairatune is not your all-in-one synthesizer. It's designed and engineered to be as powerful and versatile as possible in it's target role as your source for tight bass, unique lead and shiny SFX sounds.

http://futucraft.com/category/kairatune/