Dammit Distortion is a guitar distortion plug-in. It is intended for heavy metal sounds and, specifically, tries to recreate the legendary guitar sound on Metallica's black album. It has a simple user interface, with just 3 sliders: PreLo, PreGain and PostGain.
Dammit is a very complex product, being the result of many years of development. It filters the input sound in over 30 stages and thus is quite CPU-intensive. Minimum hardware required is 1GHz AMD Athlon XP or similar.