Quick Post FX is a Blender add-on for color grading rendered or viewport results in Cycles using Blender's real-time compositor. After installing, you find it on the Tools Panel, click the Composite Button to add the required nodes, then pick a color grade preset and edit it.
The add-on includes 14 filmic color grading composition presets built to emulate film stocks, with named looks such as SuperMan Vs BatMan and Harry Potter. Every preset is fully customizable: you can adjust exposure, contrast, saturation, vibrance, brightness and hue, tweak individual color channels, and use color balance to shift the overall temperature warmer or cooler.
Beyond grading, Quick Post FX applies image filters including blur, vignette and lens distortion, plus bloom and glare effects with adjustable intensity, size and shape. It runs through Blender's node-based compositor and gives real-time feedback in the viewport, so adjustments and presets show as you make them.