Raw Render - Post-Production Tools is a Blender add-on from SMArchviz that provides a UI panel for perfecting colors directly in the viewport render. It offers real-time feedback and control over the overall look, so you can adjust renders without manually setting everything up in the compositing workspace.
From the "Post-Production" side panel in the 3D View, you can tweak and adjust the look of a render — correcting color tones, gamma, saturation and shadows, adding sharpness, and adding chromatic aberration. Multiple presets can be saved and loaded. The add-on works with both Cycles and EEVEE Next.
Version 1.1 added the option to export the post-production settings to a file and import them, so the same settings can be opened in other projects. It also added color correction settings for more control over the look of the image, along with minor bug fixes. Documentation is available, and a demo video is provided.