Big Apple Compressor

The Big Apple plugin is a feed-forward dynamic range compressor based on the ideal VCA mathematical model. This audio processor allows you to use the parallel compression mixing technique (also known as New York compression) in your everyday work. The parallel compression works inline without any additional routing inside your DAW.

The "Big Apple" plugin also available as a simple unit!

https://hasound.com/products/bigapple/

FirComp is a zero-latency compressor designed to sound musical and transparent. The plugin can handle fast attack settings (down to zero milliseconds!) with a high compression ratio. It sounds clean at moderate settings while applying gentle distortion at high compression levels.

The plugin was designed to add punch without distorting the signal. On the other hand, FirComp also features an optional look-ahead feature for smooth compression on instrument busses and the master channel. It delivers transparent compression.

FirComp is well-optimized for low CPU consumption.

https://jonvaudio.com/fircomp/

TBT TLS 1295 LEA Free Compressor

 Whereas the TLS 1295 LEA plugin does borrow its core functionality from the original LA-2A units, it adds numerous added features and workflow enhancements. The user can fine-tune almost every parameter, from the envelope timing and saturation level to the side-chain high-pass filter and dry/wet mix levels.

The plugin also features a gain reduction meter, a clipping indicator, copy/paste functionality, A/B testing, and built-in MIDI learn. Select any parameter and assign a MIDI CC to it.

https://www.kvraudio.com/forum/viewtopic.php?f=6&t=558511

BUSTERse

 BUSTERse bus compressor.

The plugin features the usual set of compressor controls (attack, release, threshold, and ratio), a makeup gain knob, and a dry/wet control. It also features a sidechain input with a high-pass filter and transient controls.

Optionally, the user can switch on the Turbo mode, which lets the compressor affect the incoming signal’s entire frequency range. Otherwise, it will focus on the middle frequencies. According to the developer, the Turbo mode emulates the behavior of hardware compressors.

Likewise, the Xformer mode engages the emulated transformer circuit, which affects the impedance, tonal character, and the overall balance of the processed signal. To bypass the plugin altogether, press the Main switch.

https://www.patreon.com/posts/busterse-42658623

GVST

GVST’s plug-ins (by Graham Yeadon) are designed by to be simple, light-weight and efficient, although some are more ambitious and some more experimental and include amongst others a Chorus, Compressor, Delay, Gate and several Filter effects.

https://www.gvst.co.uk/index.htm

Vocal King

Vocal King Plugin: Dynamic effect guaranteed to help instruments or vocals sit in the mix! Used in several studio's around the world. One of the best character compressors!

• The pres compressor knob is the main work horse of the Vocal King. Turning the pres knob up turns up the gain and brings out the presence in the vocal along with giving it a smooth compression. Low cut, tighten, and bass works with the pres compressor to help take out the mud without making the vocal sound too thin. The crispy knob give highs some sparkle that many will find satisfying. Final compressor gives that extra compression to the vocal to make it sound thick. DB output turns the volume down. Use the power switch to quickly hear the difference between dry and processed. A, B, C, D, modes, I will let you find out what that means. The meters show gain reduction after signal is past 0db.

VK-2knob: The simple version of Vocal King. Great for compression any signal.

jParaComp: A dedicated stereo/parallel compressor.

jEq15Comp: Easy EQ the sound with the 15 band graphic equalizer. Afterwards, compress the signal.

https://www.jhudstudio.com/paid-plugins

e-phonic XPressor

Add some warmth to your mix
XPressor is a high quality saturation and dynamics processor. It's capable of making your drums, vocals and instruments stand out in a mix. From subtile warm saturation to overdrive, XPressor adds that extra touch.

Soft clip, hard clip and wavefolder algorithms
Built in dynamics processor
Low and high cutoff filters
Up to 8 times oversampling

http://www.e-phonic.com/xpressor.html#/

Signal Noise SN01-G Compressor

SN01-G was inspired by two classic VCA buss compressors of UK and US variety to provide a musically pleasing buss glue, or smash (laugh), while also being an efficient channel insert with low ASIO/CPU footprint. Sonically, it ranges from almost opto-like smoothness up to true hard-knee brick wall limiting."

• feed-forward topology with linked channels.
• standard controls for threshold, ratio, gain, and envelope.
• adjustable width and strength of the knee.
• dry/wet control for parallel compression.
• 2 optional filters for internal side-chain.
• optional 'push' effect for more extreme compression.
• no saturation modelling.

https://senderspike.wordpress.com/2019/11/12/sn01g/

1208 SCS Channel v2

1208 Audio has released 1208 SCS Channel v2 (free version), plugin effect for Windows.

- Routable modular signal chain
- HP & LP mix filters
- 4 band classic parametric equalizer with bell & shelf curves
- Versatile all purpose compressor
- Saturation, stereo, phase, pan and limiter control
- VU metering with clip indicators
- Optional 4x oversampling

https://1208audio.com/downloads/1208-scs-channel/

ATKAutoSwell

Matthieu Brucher has released version 2.0.0 of ATKAutoSwell, a free and Open Source swell plug-in (compresses the full signal, not just above threshold)

The plugin now use the JUCE framework and is optimized for SSE4.2 processors on MacOS and AVX processors on Windows.

This plugin requires universal runtime libraries on Windows as per Microsoft recommendation (see the blog post for more details).

http://blog.audio-tk.com/2018/02/20/announcement-atkautoswell-2-0-0/

Bakuage BasicComp

BasicComp is high-quality VST3 compressor plugin that is focused to compress dynamic range naturally. It is suitable for mastering, vocal track, and drum track.

https://bakuage.com/en/vst/

ComBear

ComBear is a parallel compressor plugin. The parallel compression means in simple words, take the original audio track (individual or group or Bus), and mix that audio track with the compressed track. The ComBear make it very easy because of its mix knob. Just adjust this knob according to how much parallel compression you need.

https://www.pluginboutique.com/product/2-Effects/8-Compressor/3985-ComBear?a_aid=598976f00d34a

ATKColoredExpander

ATKColoredExpander, a free and Open Source compressor plug-in, for 64-bit Mac OS X (10.9 minimum) and Windows (32 and 64-bit) in VST2, VST3 and AU plug-in formats.
The plugin now use the JUCE framework and is optimized for SSE4.2 processors on MacOS and AVX processors on Windows.
This plugin requires universal runtime libraries on Windows as per Microsoft recommendation (see the blog post for more details).

http://blog.audio-tk.com/2017/11/28/announcement-atkcoloredexpander-2-0-0/

Smacklabs Logic Channel

Inspired by the famous “nine thousand series” British console, the Logic Channel provides a high quality channel strip with Compressor, Gate, Filters, and EQ.
-All EQ and Filter curves based off of the famous nine thousand series British console
-Channel Compressor based off of the famous nine thousand series British console
-A Hard Knee Gate based off of the famous four thousand series British console

https://smacklabs.wordpress.com/2011/08/31/hello-world/

Dead Duck Free Effects Bundle

The Effects Bundle provides 24 original VST audio effect plugins covering everything from essential mixing tools such as EQ, compression and limiting to creative sound shaping tools such as delays, modulation effects and reverb:

• AutoFilter.
• AutoPan.
• BitCrusher.
• Channel.
• Chorus.
• Compressor.
• DeEsser.
• Delay.
• DualFilter.
• Equaliser.
• Expander.
• Filter.
• Flanger.
• Gate.
• Limiter.
• MonoDelay.
• Overdrive.
• Phaser.
• Reverb.
• RingMod.
• SigGen.
• TiltEQ.
• Tremolo.
• Utility.

http://deadducksoftware.blogspot.com.es

MAX1

An automatic compressor with “intelligent” and variable release time and ratio settings.

The effect features an auto-release algorithm which conforms the compressor’s response to the characteristics of the processed signal. To make the workflow simpler than what is normally seen in a compressor, MAX1 features only the threshold, attack, and post gain (aka output volume) knobs, along with a soft clipper switch and a peak/RMS switch for the gain reduction and volume meters. In practice, this means that the user can simply load the plugin on a channel that needs to be compressed, adjust the threshold value to set the compression amount, and adjust the attack time to taste (depending on how much or little the transients need to be emphasized).

Control your peaks very easily or increase the energy and levels of your track or mix effortlessly.
Few controls but “Huge” sound!
The Plugin has accurate metering for both L/R input and output channels as well as Gain Gain Reduction Metering.
Great Presets to get you started on all types of material and also save your own presets.
When compressing a lot , just use the “Attack” knob to dial back the punch easily. Use the soft limit to make your tracks loud effortlessly and transparently.
Never Lose “Bass” when maximizing your mix or sounds, retain the character of your sounds with this transparent dynamics processor.
Easy Effortless Compression and Energy Maximization.

https://www.beatskillz.com/max1/

Fetish compressor

Classic Fet Compressor/Limiter
Discrete design
Super-fast attack time
Input and output stage distortion
Improved input control
Selectable ratio

http://analogobsession.com/product/fetish/

Vocal king

The Vocal-King plugin! It’s been my dream to make a Vocal Plugin. The idea of this plugin is to simply bring out the presence and clarity in vocals.

http://www.jhudstudio.com/free-plugins

DSP-2 VOCAL

DSP-2 is a high precision insert effect for vocal processing which includes an Intelligent Dynamic Processor, a saturator, a four band equalizer fixed on vocal key frequencies and a room emulator based on the Schroeder reverberator. DSP-2 has been designed to be an easy to understand solution for all your vocal processing needs.

FEATURES:

· Intelligent Dynamic Processor (IDP)
· Four different automatic operative modes:
· Selectable compression ratio
· Saturator with three different operation modes
· EQ fixed on vocal key frequencies
· Room emulator based on Schroeder reverb model
· Transparent increment of the perceived volume level
· High precision input/output VU-meter
· Low CPU usage
http://www.maxsynths.com/vst_dsp2.html#fane1-tab

Xfer Pump compressor

Xfer Records OTT is a free re-creation of a popular aggressive multiband upwards/downwards compressor set-up used by many dubstep and electro producers.

https://splice.com/plugins/3788-ott-vst-au-by-xfer-records