Blockfish

Price: Free
Difficulty: medium
CPU: low

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C3 Multi Band Compressor 1.2.10 

One of the very few free multiband compressors around. The most attractive solution for anyone on a budget who's interested in the Waves C4 multiband compressor. It features the following characteristics:

• Three stereo compressors.
• A master limiter.
• Flexible dividing filters(ButterWorth Filter or LinearPhaseFIR Filter).
• Sampling Rate: 44.1k, 48k, 88.2k, 96k support.
• 32bit float internal precision.

Price: Free
Difficulty: medium
CPU: low

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Classic Compressor

Classic Compressor is a classic analog style VST compressor plugin with a lot of warmth and punch. Special designed to use on individual Instruments and vocal, but also useable on your final mixes. Features :

• Smooth Compression
• Ajustable ratio up to limiting
• Ajustable attack and release times
• Ajustable knee (hard to soft)
• Gain reduction LED
• Presets
• Ultra low CPU usage
• Supports all sampling rates
• Full VST automation 
  

Price: Free Difficulty: easy CPU: low 

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Compadre

The 4 channel input stereo sidechain versionCompadre is the result of more than one year of research, development, and countless hours of listening tests. The final product is a quality compressor that not only delivers a highly optimized sonic behavior, but also drips with character. This is the 2 channel input stereo sidechain version (the regular one).

Price: €49.00
Difficulty: medium
CPU: medium

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Compressor DeEsser

COMPRESSOR/DEESSER
TC Electronics Compressor/Deesser is part of the TC Native Bundle, and considered the "Swiss Army Knife" for single band dynamics processing

COMPRESSOR
The Compressor section not only includes standard controls like Attack, Release, Threshold and Ratio, but also features a Hold Time, Automatic Make-Up Gain and Soft Knee controls. These parameters allow you to "fine-tune" the sound characteristics of the Compressor from "analogue" to digital - and to adjust the overall behavior for processing a single track or mastering a complete playback.

Discontinued
Difficulty: easy
CPU: low

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Endorphine

Features:

•  Two independent frequency bands (low and high frequency processing)
• Switchable stereo or M/S mode operation
• Two basic compressor designs.
  
1. Modern vca mode with soft-knee characteristics and manual time constants. This mode provides an instant response behaviour and deep compression, using a feed-forward circuit.
2. Vintage-style opto (photo resistor) mode, modelled after ancient opto-electrical compressors. The time constants stay manually set, but they are also affected by the signal's energy. This mode has the typical opto-style 'overshoot' on quick transients, this is one of the most gentle compressors you may find. Classical feed-back detector circuit
• Adjustable high-level output stage with analog-style saturation
• Global 'de-comp/sat' section. It's you who decides how the unit reacts to large amounts of gain reduction as well as when and how to saturate.
• Maximum output: -0.1dBFS. This is very helpful when using the plugin as the last stage before burning the CD.  

Price: Free
Difficulty: medium
CPU: low

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Magneto

Magneto is the perfect tool for Mastering "purists," achieving analogue warmth without adding any unwanted noise or other artefacts. It is also the perfect creative tool for introducing "soft overdrive" on drums, guitars and many other instruments.

The smooth compression resulting from hi-level recording on to tape machines is appreciated by a lot of producers. The developers from Spectral Design measured the behaviour of a Lyrec 24 track tape machine and put this data into the Magneto Plug In. Whenever you use Magneto it is as if you were recording on such a machine.

Discontinued
Difficulty: medium
CPU: medium

Download Magneto  

More Pressure

Do you like Pressure, the free version of this plugin, but you want more flexibility? Well, with More Pressure you can tweak a variety of compressor settings to get the sound that you want. It's only $5.00. Payments are accepted through PayPal.

What exactly is More Pressure? Have you ever wanted a mastering compresssor that was dead-easy to use? A compressor that just made things louder without having to worry about the best Ratio, Attack, and Release settings for a specific task, but provided a way for adjusting these settings? A compressor that didn't over-compress attack transients, robbing your track of all the excitement of explosive hits? A compressor that was downright freaky looking?

Price: €5.00
Difficulty: medium
CPU: medium

Download More Pressure  

Multiband Compressor

Multi-band compressor with Mid/Side processing modes.

Neodynium

Don't get confused - this is not multi-band compression. Neodynium is an entirely different beast. Why always apply the same compression to all audio levels? Compress the louder levels with a quick attack; expand the lower levels with a slow release and leave the mid level sounds alone. Try it with a traditional compressor - you won't get far. Neodynium lets you break your audio levels up into "zones" so you can control them exactly how you want. No one size fits all compression here.

Price: €130.00
Difficulty: medium
CPU: medium

Download Neodynium 

Pressure

Have you ever wanted a mastering compresssor that was dead-easy to use? A compressor that just made things louder without having to worry about the best Ratio, Attack, and Release settings for a specific task? A compressor that didn't over-compress attack transients, robbing your track of all the excitement of explosive hits? A compressor that was downright freaky looking?

Price: Free
Difficulty: medium
CPU: medium
Download Pressure 

Ruby Tube

RubyTube simulates tube preamps for those that can’t forget. If you are missing that subtle sparkling and compression that you get when using ancient audio equipment, RubyTube might be something for you. And like many other good things in life, RubyTube is free.

RubyTube is a real time, digital tube amp simulator. RubyTube simulates the saturation effect that can be found in audio equipment with vacuum tubes. This effect is usually hardly noticable but it is responsible for the classic tube sound. Sometimes its just a sparkle on the voice and a slight compression of drums and bass that makes the difference between a neutral recording and a warm and full sounding song.

Price: Free
Difficulty: easy
CPU: low

Download Rubytube  

Side Chain Compressor

Features:

Side Chain Compressor offers stereo and mono modes.

Price: Free
Difficulty: easy
CPU: low

Download Side Chain  Compressor

Crunchessor

Crunchessor is a general-purpose track compressor that offers easy tuning and valve-type processing which is applied in parallel to compression. Features:

• Easy compressor tuning.
• Valve warmness. Coloration styles.
• Fast and slow attack modes.
• Gain reduction meter.
• Factory presets.
• "A-to-B" comparisons.
• Mono-to-Stereo, Stereo-to-Stereo processing.
• All sample rates supported.
• 64-bit internal precision.
• Native assembler DSP code.

Price: €38.00
Difficulty: easy
CPU: low

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VST PlugIn Technology by Steinberg.
VST PlugIn Interface Technology by Steinberg Media Technologies GmbH.
VST is a trademark of Steinberg Media Technologies GmbH.