So being unsuspecting and curious, I went over to take a look again at their products... Then I remembered that Vocalizer was their product. I came across this the time I bought Native Instruments Komplete 8. I was quite amazed by the technology and the limitless possibility this product can have.
It is not merely a vocoder (even though it functions superbly as a vocoder). It is a synthesis engine that takes waveform as input. It can take anything from instruments tracks, a percussive beat and human voices. With that as an input, and relatively simple and easy-to-understand controls, Vocalizer can output unlimited variations of the sound, bringing up harmonics (primaries and secondaries), morphing it into something totally wild (if you so wish it). Every control can be automated and assigned to midi controllers.
Listen to the demo here (or go to the Vocalizer product page). There are also quite a few videos from the product page. They are hosted by YouTube.com so I am embedding them here: