From FabFilter Software Instruments:
FabFilter Saturn gives a range of different high quality distortion models, inspired by the vintage sound of tubes, tape and guitar amps. In addition, you also get three creative distortion styles, with which you can smudge, stretch, crush, rectify and clip your sounds in weird and unexpected ways. With its multi-band design and per-band feedback, dynamics, drive, tone and modulation options, Saturn will bring a unique flavor to your music. FabFilter Saturn contains MIDI Learn, Smart Parameter Interpolation for smooth parameter transitions, extensive help with interactive help hints, and AltiVec and SSE optimization.