Originally made to process vocal samples in a pitch shifter and a gater, VoCoGaTe can make infinite percussion variations. Many random options help to create patches. It is not an easy instrument to program but one can achieve some cool sounds with a bit of a time and patience.
VoCoGaTe comes in Pro (PC/VST/€30) and Free versions. The free version has some restrictions but it is fully usable and allows to save/load one preset at a time.