Blue Cat's Flanger - Classic Flanging Effect Audio Plug-in (VST, AU, RTAS, AAX, VST3) (Freeware)
Very famous during the 70's and 80's, the Flanger effect can be used on almost any audio track: on drums, voices synths or guitars, from a subtle effect to a deep alien-like voice effect, enjoy it! 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!