Phazor is a free phaser VST plugin developed by Adam Szabo. Compatible OS(s): Windows, macOS.
Phazor emulates the phaser effect found in the Virus synthesizers, which helped make its characteristic sound. Every control has been carefully adjusted to behave just like the phaser from the Virus. It has selectable 1 to 6 stage all-pass filters controlled by an LFO, with spread and feedback controls.
The plug-in is highly optimized and its CPU usage is minimal, allowing for multiple instances to be used in a project.
http://www.adamszabo.com/