Blue Cat's Flanger by Blue Cat Audio Product Description
Despite its simple user interface, Blue Cat's Flanger is very versatile: harsh and metallic or smooth and soft filtering effects, it can do them all, for free!
The stereo version also lets you smoothly transform it into a stereo flanging effect with a single knob. Push the "Spread" slider and hear the difference: the effect is turning around your head, and the sound takes another dimension, spread into the stereo field.
Vintage flanger effect.
Stereo spread control.
Sine or triangle LFO shapes.
In or out of phase feedforward and feedback paths.