GRM Tools Classic VST is a bundle of eight plug-ins that provide
superb tools for sound enhancement and design. Conceived and
realized by the Groupe de Recherches Musicales (Musical Research
Group) of the National Audiovisual Institute, Paris, France, GRM
Tools is the result of more than 20 years of research and
development by composers and sound designers in sound
transformation software.

The plug-ins are:
Bandpass
Comb Filters
Delays
Doppler
Freeze
Pitch Accum
Reson
Shuffling

If you are not familiar with these plug-ins, we suggest you take a quick online tour.

http://www.grmtools.org/quicktour