Here we add some resources useful to Pro Tools users.
List of plug-ins available for free, last update 1 December 2012:
Bomb Factory collection, Avid Audio, http://www.digidesign.com/index.cfm?navid=26&langid=100&itemid=4201&mkt=ALL&downloadid=21856
ampLion free, Audiffex, http://www.audiffex.com/EN/amplion/518/downloads.html
U-he, Zebralette, http://www.u-he.com/cms/zebralette
Avid Audio, Xpand!, http://www.avid.com/US/products/Xpand
ValhallaDSP, ValhallaFreqEcho, http://www.valhalladsp.com/valhallafreqecho
Two Notes Audio Engineering, Torpedo PI-FREE, http://www.two-notes.com/en/software/torpedo-pi-free/
XLN audio, Studio Grand free version, http://www.xlnaudio.com/products/view/35
Avid Audio, Structure Free, http://avid.force.com/pkb/articles/en_US/download/en356219?popup=true&NewLang=en&DocType=1450
Soundhack, Delay Trio+Freesound Bundle, http://www.soundhack.com/freeware/
Cableguys, PanCake, http://www.cableguys.de/pan-cake.html
Tritone Digital, MuteTone, http://www.tritonedigital.com
Ddmf, ColourEQ, http://www.ddmf.eu/freeware.php
Fxpansion, DCAM FreeComp, http://www.fxpansion.com/index.php?page=185&tab=443
Fxpansion, ClapOMatic, http://www.fxpansion.com/index.php?page=83
Camel, Audio Alchemy player, http://www.camelaudio.com/AlchemyPlayer.php
Camel, Crusher, http://www.camelaudio.com/camelcrusher.php
Metric Halo, Thump, http://apps.avid.com/metric-halo/
Softube, Saturation Knob, http://forms.avid.com/forms/AAXpluginoffer2012
Elysia, Niveau Filter, https://www.plugin-alliance.com/en/plugins/detail/elysia_niveau_filter.html
Flux, BitterSweet II and Stereotool, https://www.fluxhome.com/download
iZotope, Vinyl, http://www.izotope.com/products/audio/vinyl/
Studio Devil, British Valve Custom, http://www.studiodevil.com/products/british_valve_custom/
login needed
IK Multimedia, SampleTank FREE, http://www.ikmultimedia.com/products/sampletank/index.php?pp=sampletank-2-xl-versions
IK Multimedia, Kontakt 5 player, http://www.native-instruments.com/#/en/products/producer/kontakt-player/
Ohm force, SymptohmPE, https://www.ohmforce.com/UseFreeSoftware.do?action=listFreeNonStandalones&productId=1274001
Ohm force, Cohmpost, http://blog.ohmforce.com/2009/05/11/ohm-force-cohmpost/
Ohm force, Frohmage, https://www.ohmforce.com/ViewProduct.do?p=Frohmage
Brainworx, bx_solo, https://www.plugin-alliance.com/en/plugins/detail/bx_solo.html
Brainworx, bx_cleansweep V2, https://www.plugin-alliance.com/en/plugins/detail/bx_cleansweep_v2.html
Brainworx, spl Free Ranger, https://www.plugin-alliance.com/en/plugins/detail/spl_free_ranger.html
PSP, VintageMeter, http://www.pspaudioware.com/plugins/tools_and_meters/psp_vintagemeter/
PSP, PianoVerb, http://www.pspaudioware.com/plugins/reverbs/psp_pianoverb/index.html
Sonalksis, FreeG, http://www.sonalksis.com/freeg.htm
Blue Cat Audio, Blue Cat's Freeware Plug-ins Pack II, http://www.bluecataudio.com/Products/Bundle_FreewarePack/
Hofa, Hofa 4U (ProjectTime, Meter, Fader & MS-Pan, Goniometer & Korrelator, http://hofa-plugins.de/pages/start_en/4u_en.php
Native Instruments, Komplete 8 Players, http://www.native-instruments.com/#/en/products/producer/komplete-8-players/?page=2433