Tintii
Tintii is a selective colour application (colorkey) and a Photoshop plugin. The Photoshop plugin is only available for MacOS and Windows (as is Photoshop) and commercial. Tintii for MacOS and Windows is available as free trial. The Linux version of Tintii is Open Source software under GPL v2 license and as full version available for free. For photographers who love to express colour, use Tintii for colour on black-and-white, colour popping, selective colour, saturation contrast and subtle hue and lightness adjustments.
