The Ohm Force Frohmage has a unique palette of sounds, combining lowpass filtering and analogue crunch with a bundle of special features. 

You can easily tune the filter to resonate with specific notes in your music, and the built in harmonic multiband feature adds tons of warmth to your sound. For extreme fun, delay effects can be applied across the filters at the turn of a single knob, creating swish phasing or weird gliding echoes. Finally, why not dial in some distortion. Whether you like your music to scream in pain, or simply crave that phat, analog tone, Frohmage's final overdrive stage is waiting to be abused."

This plugin is available in the following standards:

VST 2.0 - Windows / Mac OS X (PPC and Intel) : For use with all VST-compatible host (Cubase, Ableton Live, EnergyXT, Tracktion...)

RTAS - Mac OS X (PPC and Intel) : For use on any ProTools OS X systems

AudioUnits - Mac OS X (PPC and Intel) : For use on Logic Audio, Ableton Live, Digital Performer and any AU-compatible host

Frohmage is free.