Set 1: G Saturator

G Saturator gives you variable saturation or desaturation and the option to use a custom luma mask (Non-linear Luma Controls) to control which areas of the image are effected.
By selecting Invert Luma, the bright colours will lose their colour, and dark colours become more saturated. The levels controls allow you to tweak the effect by defining how dark or bright the tones of the mask are and hence how much they affect the saturation.

Set 1: G Saturator Balanced

G Saturator Balanced modifies bright and dark regions separately. The luma mask controls which areas of the image are treated as Brights and which are considered Darks. Saturating bright regions while desaturating the dark regions can create a very striking visual look. Use the Luma Mask Controls to mix the colour balance used to create the luma mask. The Luma Levels give you the ability to finely tweak the luma mask.