Tube Guitar Amp plugin: Ndzeit Audio - Dirthead v0.61 Pc / Free

Dirthead is a tube guitar amp that features three channels, clean, crunch and ultra. It comes with the usual controls found on guitar amplifiers and additionally a voicing knob that alters some internal poweramp parameters.
Dirthead is available as a freeware vst plugin for windows and can be used in every host application that supports vst plugins.

"Dirthead is my latest attempt at modelling a tube guitar amp." Via