High Quality Picture Editor Free Download [exclusive] Link

Darktable focuses on the science of light. It allows for precise "demosaicing" and tonal adjustments that preserve the maximum amount of data in your images. 3. Krita: For the Artistic Editor

Advanced users who need deep customization and complex retouching.

A high-quality editor should allow you to export in lossless formats like PNG or TIFF, not just compressed JPEGs.