An excellent-sounding Leslie simulator, especially considering it's free. :) Smoothly simulates speed-up/slow-down when switching speeds.

Use in combination with mda ePiano for instant "No Quarter", or with mda Piano for when you're going for that warbling, eerie Pink Floyd "Echoes" piano effect.

Sounds great on guitars too...I've come up with a decent pseudo-Univibe effect by combining with mda Detune and messing with the settings.