Drum One is a fully-featured drum synthesizer/sampler for Kontakt 6.4.2+ that comes with 64 factory drum kits and can hold up to 128 presets per instance. Each drum kit in Drum One is powered by seven drum engines with 4x26 source waveforms each.
Drum One features individual control over body, hit and noise shapes, comes with modulation envelopes and filters as well as master effects like reverb, saturation and compression. It has a dedicated mix page, a library screen and features full preset randomization.
On top of that, you can import your own WAV files as well.
Drum One is free for customers that subscribe to the Rigid Audio newsletter.