iZotope has released Vocal Doubler, a free plugin that is designed to support your vocal with a natural doubling effect, adding rich tone and depth.
The plugin lets you control the doubled effect directly through an interactive visualization. Simply drag up and down to increase or decrease the stereo separation and pull left or right to add natural human-like variation to the signal.
Vocal Doubler is perfect for placing directly on your vocal track and just adding a touch of space to make it stand out in the mix.
Using “Effect Only” mode, you can also create multiple doubled vocals on different tracks to further customize your sound.
Vocal Doubler is available for Windows and Mac (VST/VST3/AU/AAX).
More information: iZotope