To celebrate Mexico's Independence, Audio Assault is giving away Grind Machine II, a guitar amp and cab simulator plug in for free. Offer valid until September 16th 11:59 pm CST.
Site shows $7.00 price discounted from $39.99. Add to cart to see $0.00 price.
Third party impulse response files (.wav format) can be added to the vst IR folder. Lots of free IR's available online.