Cartha - Color Variator for Photoshop
The extension will help to find perfect color combinations for your illustrations and photos.
Autochange + Autosave options makes hundreds variations of your images in a few minutes.
Supported Adjustments - Brightness/Contrast, Levels, Curves (exclude Smart Filters), Exposure, Vibrance, Hue/Saturation, Color Balance, Black White, Channel Mixer, Selective Color.