Krita

Krita – this is a professional and completely free open source raster graphics editor. Despite the initial focus of Krita on creating images from scratch, there are enough opportunities not only for artists, but also for photographers. Krita supports non-destructive editing of layers and masks, working in different color spaces and with different color models, in a mode from 8 to 32 bits with a floating point per channel. In addition, popular filters, adjustment layers, masks and dynamic filters are implemented, as well as a series of tools for retouching and much more.