GIMP is a free and open-source image editing software used for image retouching, image composition, and image authoring.
Inkscape is used for creating and editing vector graphics such as illustrations, diagrams, line arts, charts, logos, and complex paintings.
It features an intuitive user interface and a wide range of tools for tasks such as photo retouching, image resizing, and color correction.
Krita is a free and open-source raster graphics editor designed primarily for digital art and 2D animation.
It comprises a subset of image editing operations specifically aimed at non-destructive raw image post-production.
Canva is a photo polishing and transformation software that serves both as a straightforward editor and a fantastic publishing tool.