We need a site like Loopproject.com to organise a review system for something like this, but without turning it into another KVR. Tricky matter… Nevertheless, a thread is a good place to start…
Freebies I love:
Blockfish - An absolute must have (along with the other fishphones), my goto vstcomp for vocal - use in opto mode, and make use of the back panel settings too!
Density - The cleanest most transparent comp I’ve come across so far.
Rescue - great as either a mastering or channel processor, used for controlling punch and width.
Tessla - Amp saturation, quality.
Echolive - My goto dub echo box, and my secret weapon for getting epic filtered soundscapes.
mda plugin pack - What are you waiting for? Get it! The standout is the mda combo, cab simulator.
dfx bufferoveride - The classic glitchy stutter sound.
skidder - Versatile volume throbbing device, with randomising features that are great for adding shimmering emotion to pads etc.
transverb - Delay feedback based pitch shifter, great for adding sparkly high versions of stuff.
scrubby - Crazy pitch mangling device, fun for glitchy stuff.
dblue Glitch - Every Renoiser should have this plugin! No need to say anymore!
A0 Parametric EQ (the DDMF ones are better but are commercial) - Clean low phase EQ with added saturation.
Ruby Tube - Great little tube saturator with a limiter: really excellent for tightening up quick transients like snappy snares.
distroyr - Need six different types of distortion all of supreme quality? Excellent on drums.
Cyanide2 - Top notch filtered distortion.
Ambience - Fantastic comb reverb with many parameters, and a nifty little ‘hold’ function for epic ambient pads.
RMS-Buddy - Use this on your master chain, great for monitoring levels when mastering.
SSL X-ISM - Use this on the end of your master chain, monitoring for intersample peaking.
StormGate1 - Host-sync’d volume enveloper, great for making VSTIs throb when pattern effects can’t.
The Classic Series - The phaser, chorus and flanger of this series are really quality.
W1 Limiter - Simple but clean-as mastering limiter.
GlaceVerb - Lush and unique sounding verb, great for that icy depth
Grungelizer - Get your vinyl sound here! Got grit?
Instajungle - Hook this buffer repeater up with your midi gear and you have live ffffffffffun.
The Modern Series - Great series of compressors and amp devices model off real hardware.
SupaTrigger - Another buffer mangler that comes in handy for light weigh glitching.
Throbber - Inspired by the band Throbbing Gristle, this little beauty is fantastic for LFO-based sonic weirdness.
SideKick - Until Renoise gets modular routing for plugins this side-chain-compressor is an absolutely must have for ducking your bass from your kick (and other assorted cool volume based tricks).
Moneo - Filter L-R channel mixer excellent for taking a stereo signal and making it mono or swapping the L+R to any position you like!
Chimera - Three noise oscillators for making the most haunting and eerie pads and leads.
Synth1 - Great for basic sounds.
Taurus - Excellent bass synth or acid riff machine, has a clear and nostalgic sound.
SuperwaveP8 - Classic Juno sound, great for leads and pads.
Oatmeal - Need FM quickly? Look no further.
Olga - Dirty beast with a quality sound.
mda E-piano - Extremely usable rhodes emulator.
Mr Tramp - Classic Wurlitzer sound, instant 70s.
Phadiz - Great little synth useful for leads and pads.
Arpy - Lovely sounding lead synth with a unique sound using the clipback feature.
Cygnus - A strange hybrid FM that has some truly awesome spacey sounds, brilliant for unsettling drones.
Drumatic 3 - Smooth and usable drum synth with many classic drum machine sounds.
Highlife - Loads samples and you can control the sample fully like a VSTI synth.
LazerBlade - You can get some densely textured sci-fi sounds out this thing.
Ixox Flute - Sampled flute at your finger tips!
LightBag II - Classsic warm organ sound, will take you back to the 60s and 70s.
mellowsound - Useful bank of 3 mellowtron sounds, great for Phil-Spector-type-epics!
MiniMogue VA - Modeled after the classic Moog design.
ProtoPlasmTS + STS synths - The transition synths have sounds out of this world. Awesome for cinematic evolving pads.
QuadraSid - Get quality sounding nostalgic chip sounds here.
Shortcircuit - Great for playing sample libraries.
Stringer - Brilliant for getting that 80s sounding string synth ‘Solina’, abused and loved by many.
StringSynth - Clean and versatile string synth, great for pads.
Triangle I (not II, I) - Retro sounding lead synth with a whole host of unique and cool sounds.
Voyager - Complex but interesting lead synth, great for lead sounds that sound like no other.
Edit: others added. + descriptions added.