(click here for download info)
A speaker and micing simulator. The free version features 1 model of power amp simulation (EL34 / AB class), 1 speaker cab (based on a Marshall 4×12) and 1 type of microphone (based on a Shure SM57).
(click here for download info)
A speaker and micing simulator. The free version features 1 model of power amp simulation (EL34 / AB class), 1 speaker cab (based on a Marshall 4×12) and 1 type of microphone (based on a Shure SM57).
Free plugins are plugins that the manufacturer of the plugin provides free for use, or fully functioning limited versions that are free to use and can have the limitations removed by purchasing.
Unfortunately for everyone, many people often confuse “illegal” plugins, plugins that have had their copy protections removed illegally (“cracked”), as “free” plugins. Those are not “free” plugins, those are “illegal” plugins. While you may be able to obtain these plugins for “free”, they are not, indeed, free.
Another instance of this is “receiving plugins from friends”, where “friends” provide you with a copy of their plugins directory. (just a heads up; most times this doesn’t work due to other missing dependencies). This is also illegal; you did not pay to use those plugins.
There are many actual free and useful plugins available. I’ve listed many of them here on this site, but there are many others that you can find on the net. Most (if not all) of the actual free plugins have user agreements that prohibit distributing them second hand, so I can only provide links here. However, many of the free plugins you might “find” on the internet are actually cracked, illegal copies of plugins that normally require purchase. I strongly discourage the use of these plugins for many, many reasons.
Many users have come across cracked plugins and have been tempted to use, or actually used them. I would like to plead with users not to do this. No matter what your reason for doing it is, no matter what excuse you give (“They’re too expensive”, “the Copy protection screws up my machine”, etc) they are still just that, excuses, and it is still just plain wrong.
There are plenty of alternatives:

So, getting to the answer to the question; what are free plugins?
Bottom line, don’t use cracked plugins. Ever.
(click here for download info)
OK, this one is a “no-brainer”. The newest version of Sampletank Free (2.5) is a “full-featured” version of Sampletank. It comes with 500MB of samples for free (don’t forget to download them; they’re separate), but unlike previous versions, can also be expanded just by purchasing the sample sets available from the “Powered by SampleTank” range and any of the “Expansion Tank 2″ sound sets, as well as importing your own WAV, AIFF, SDII, AKAI S-1000/3000, and Samplecell files.
It has all of the features of the full fledged product, just not the sample sets (which can be purchased at a later time if you wish).
Again, for free? A no-brainer must-have. Seriously.
(click here for download info) 
From the Elysia website:
“Its main function is to change the proportions between high and low frequencies. The principle is quite similar to a pair of scales: Dependent on the gain setting around a variable center frequency, the high frequencies are boosted whereas the low frequencies are attenuated (or vice versa) at the same time.”
(click here for download info) 
8 free plugins. Not just one; 8!
Blue Cat Audio has a bundle of free plugins available for download that include:
Whether or not they will be useful to you is really up to you, but at the price (FREE!) they are definitely worth a try.
(click here for download info)![]()
Yet another “amp simulator”, but a fairly decent one. Simple controls (just like a real amp) and… it’s FREE! Useful for more than just guitar as well (vocals, crushing some drums, etc). A must have, in my book.
(Did I mention it was free?)
(click here for download info)
Drumcore Free is a “light” version of the full Drumcore product. It can be used as a “groove player” or as a triggered drum sampler. It includes only 2 drumkits (rock/pop and hip-hop), and is definitely a “tease” of the full product as it cannot be expanded or added to without puchase, but is still fairly useful.
The De:Esser is exactly what it says, and what you think it is.
(Click here for download info)
Limitations of the freebie:
All of these limited features of the free version are available in the full, paid version, which at the price ($79) is really worth it. It still works great as the demo, though, which is why it is listed here.