Film-like curves for the RGB Curve node (Compositor) and Curve Modifier
Film-like curves originated from Adobe.
"It’s an RGB curve where the tone curve is applied on the largest and smallest value, and then the middle value is adapted to keep a constant hue as defined by RGB-HSL/HSV. In terms of look and saturation increase it’s very similar to a pure RGB curve, more so than a HSL-L curve or HSV-V curve, but some color shift problems are avoided."
Other tools like Natron, Krita and RawTherapee have implemented this curve tone.