Saturation

BMAFB

BMAFB is a free saturation and overdrive VST, VST3 plugin developed by EXE Consulting. Compatible OS(s): Windows 64b.

64-bit distortion and fuzz pedal emulator with three stages of amplification/clipping in addition to input amplification stage. Please see YouTube channel for EXE Consulting for introductory video. Please see SoundCloud for EXE Consulting for songs that employ this distortion and fuzz box emulator. VST2/VST3 again.

This pedal emulation can produce very high gains. Please feed the output into a low-gain amp sim such as LG2Amp, especially for live playing. Too much gain and feedback may produce a very high-pitched squeal.

http://www.execonsultingtx.com

BlackBooster

BlackBooster is a free saturation and overdrive VST plugin developed by NSP. Compatible OS(s): Windows.

BlackBooster is a free audio plugin for Microsoft Windows, booster stomp emulation, based on real scheme. BlackBooster is a multi-purpose effect and can be used not only for guitar.

Features:
• 64-bit internal processing
• input level adjustment
• stereo processing
• 64/32-bit versions.

http://www.nsp-vst.ru/

Bitsmacker

Bitsmacker is a free overdrive and saturation Audio Unit plugin developed by Meatscience. Compatible OS(s): macOS.

Bitsmacker is a digital distortion swiss army knife for adding that certain digital crustiness to your pristine audio signal. It can simulate vintage samplers, classic video game systems, and other lo-fi paraphernalia. At extreme settings, it warps your audio with power you can’t get from a stomp box or full stack.

Features:

Zero-latency.

Sample rate reduction from 50 to 44,100 hz.

Bit depth range from 0.01 to 32 bit.

Parametric EQ on Input.

Parametric EQ on Output.

Drive adjustment for boost.

All values continuously variable, no large steps between values.

http://meatscience.net/

Better Run

Better Run is a free overdrive and saturation VST plugin developed by RunBeerRun. Compatible OS(s): Windows.

Better Run is a high gain overdrive plug-in for the electric guitar. It features 3 gain modes and an optional midrange boosting circuit.

https://runbeerrun.blogspot.com/

Best served cold

Best served cold is a free overdrive and saturation VST plugin developed by RunBeerRun. Compatible OS(s): Windows.

Best served cold is an amplifier simulator for the bass guitar with a 3-stage preamp section. It is similar to hardware preamps that accentuate dynamics.

https://runbeerrun.blogspot.com/

Berrtill

Berrtill is a free overdrive and saturation VST plugin developed by Shuriken. Compatible OS(s): Windows, macOS.

Berrtill is a distortion-unit modelled on circuit bent hardware.

http://www.shuriken.se/

Baxxpander

Baxxpander is a free overdrive and saturation VST plugin developed by Elogoxa. Compatible OS(s): Windows.

A vintage style saturation/bass expander unit.

http://www.uv.es/~ruizcan/p_vst.htm

bassPath

bassPath is a free overdrive and saturation Audio Unit plugin developed by Loud Software. Compatible OS(s): macOS.

bassPath provides the most popular effects processing path for bass guitar or synth bass. It includes distortion/overdrive, limiter, speaker cabinet emulator, Three band variable EQ, Chorus, and Delay. Custom user settings are supported, along with four factory settings.

http://loudsoftware.com/

Bandisto

Bandisto is a free overdrive and saturation VST plugin developed by mda. Compatible OS(s): Windows, macOS.

Multi-band (3 band) distortion. Creates the sound of torn bass bins and other subtle effects.

http://www.mda-vst.com/

ATK SD1

ATK SD1 is a free saturation and overdrive VST, VST3, Audio Unit plugin developed by Matthieu Brucher. Compatible OS(s): Windows 64b, macOS.

ATK SD1 is an emulation of the Boss SD1 overdrive. It is built on top of the Audio ToolKit library, and implements the overdrive (oversampling x8) and the tone sections of the original pedal.

Contrary to usual distortions, the SD1 features an asymmetric overdrive section that adds even harmonics to the sound.

http://www.audio-tk.com/