Some really useful plugins here, thanks for sharing! 

Mow that’s a pretty useful one 
Strip Tool is a virtual channel strip offering various types of digital audio processings. It offers:
All here
http://vb-audio.pagesperso-orange.fr/us/products/striptool/striptool.htm
tSE Audio, who put out some cool free emulations of famous guitar stomp boxes has another freebie

This one is targeted to bass guitar and from the GUI we can assume that it emulates the Sans Amp classic pedal. So, emulating an emulator 
http://www.theserinaexperiment.net/software.html
Very usefull
D-Blue Glitch
http://www.kvraudio.com/product/glitch_by_illformed
Glitch is one of the more interesting free VST effect plugins available. Glitch from DBlue (Kieran Foster) is a good multi-effect processor with some unique features that enables it to stand out from the long list of available free VST effects.
You can think of Glitch (Current Version 1.3.04) as a kind of multi effect sequencer. The incoming audio gets divided into individual steps of various lengths. A variety of effects can then be applied and mixed into those segments and the sequence looped. There are controls to adjust the level and amount of the effect as well as the length of the sequence and mix of the effect on the original sound. The effect for each segment can be random, preset to one of the effect modules or bypassed to the original clean audio.
The effects themselves come in the form of guitar stomp box like modules which themselves have a number of adjustable parameters, variables and presets. The Glitch effect modules include tape stop, modulator, retrigger, shuffler, reverser, crusher, gater, delay and stretcher. There are also global controls for overdrive distortion, selectable filter settings and a master overall effect mixer control.
There is a randomizer for the sequence steps, effects or both. Glitch also has built in templates and preset banks of settings and effects in standard vst fxb format bank files which can be saved and loaded.
DBlue Glitch works especially well with drum loops and percussive sounds but works well with other types of audio as well. Musicians and artist of electronic, techno, house and experimental idm genres of music will find Glitch an extremely effective tool within their audio toolboxes.
Glitch – page 4, but thanks anyway, your post is more complete and informative 
So, here are some new ones:
Sonic Enhancer – a free simple dual-band enhancer.

Sonic Maximizer – another simple dual-band enhancer, with somewhat different flavour.

Available formats are VST2 (Win32), VST3 (Win32), Standalone (Win) and x64 Test-pack.
More info and download here:
http://elements.byethost3.com/plugins.html
Before posting the Glitch I quickly went through all the pages of the thread to make sure it hasn’t been already posted, but I was only looking for its picture, so I missed that link, sorry. Anyway, this plugin is very useful for creating talking bass so prevalent in Dubstep: http://youtu.be/IUppIE9hZqg?t=49s
Mid-side processor, might be useful to some:

‘The Mid-Sider’ is a plugin for decoding mid-side type stereo recordings.
Windows – VST (32/64)(4Mb) – v1.0
Windows XP, Vista, 7, 8
VST 2.3 Compatible Host
32-bit & 64-bit
http://arcticanaudio.com/the-mid-sider/

Behemoth free VST Instrument by Torn Sub
Torn Sub has just released a new free VST Instrument Behemoth, a free plugin which simulates the sound of the legendary E-bass guitars alongside with true fat analog synths from the past and the present and much more. Our goal is to find easy to use ,cheap,intuative but, yet powerful and qualitative ways to make your next daw project sound great. In our first instrument project, we have decided to focus on the base line section and months after that “Behemoth” was born, and… he is also the responsible to our weird name,”torn sub”… We hope you will love it .Give it a try, its totally free!!!
http://www.producerspot.com/behemoth-free-vst-instrument-by-torn-subThanks HexLoops for your input. I think I was posting that onour free synths forum thread, well, an useful synth anyway, but here I tend to post effects only.
Here comes another amp simulator, a bit CPU hungry but pretty versatile:





Guitar Amp 2 Free Edition includes two amplifiers for guitar and bass and some other gears (tuner, compressfuzz, reverb…etc)
http://www.plektronfx.com/guitaramp2fe.php
