Ozone Imager is a free stereo imaging VST / AudioUnit & AAX plug-in for your DAW or NLE. Born from Ozone’s legendary Imaging technology, Ozone Imager can narrow or widen your stereo image with simple controls, stunning visuals, and incredible sound.
Monstr is a free multiband stereo imaging plugin effect, available for Windows, Mac, and Linux. It allows the user to control the stereo width of a sound in 3 different frequency bands, and so can be used to perform common tasks such as narrowing the bass frequencies while adding width to the highs, allowing fine control over the stereo image of your mix.
Stereo Tool v3 is a complete stereo imaging and analysis tool. Stereo Tool v3 features ultra precise control of input gain and individual pan for left and right channels. A phase inverter is available on each channel. Global stereo pan and stereo width settings are also implemented to complete the management of the stereo signal.