One of the most popular alternatives to MyPaint is GIMP, which is free and open source. Other popular alternatives are Krita, Adobe Photoshop, Paint.NET and Affinity. Digital Painting Tools like MyPaint are a crowded field, with more than 100 alternatives for Windows, Mac, Linux, the web and iPad.
PictBear is an image editor and paint program that is very friendly toward the beginning user, PictBear is very straightforward and easy to use no matter what your skill level is.
United States
Seashore is an open source image editor for Mac OS. It features gradients, textures and anti-aliasing for both text and brush strokes. It supports multiple layers and alpha channel editing. It is based around the GIMPs technology and uses the same native file format.
ChibiPaint is an open source oekaki applet, a software that allows people to draw and paint online and share the result with other art enthusiasts.
KolourPaint is a simple painting program to quickly create raster images. It is useful as a touch-up tool and for simple image editing tasks.
Germany
EU
Edit and manage photos on Windows with cropping, resizing, rotating, filters, stickers, drawing, collage layouts, organization tools, and support for JPG, PNG, GIF, TIFF, BMP. Features frames, blur, automatic enhancement, and a simple interface for easy editing.
CyprusEU
You can use it to view your photographs and improve them. Showfoto is the standalone image editor of the digiKam project.
GermanyEU
Build non-destructive image pipelines with 99 composable nodes. One graph produces every color variant, every format, every export, automatically.
United States
PhotoKit.com is integrated with a powerful online photo editor, smart brush, image quality enhancement, exposure repairment and image filters, splicing, cropping, transformation, painting, resizing, and can add text, shape, sticker, frame, round corners, etc.
Vector graphic software streamlining the creation of illustrations, logos, and business materials using auto-connected paths, smart tracing from hand sketches, built-in stylus and finger support, advanced color tools, gradients, and PNG, JPG, SVG file compatibility.
Pixeluvo is a beautifully designed photo and image editor for PC. It supports everything from simple color and contrast tweaks, cropping and resizing, to complex photo montage with multiple layers, masks and effects.
United Kingdom
Fluid Paint is an open-source web app that simulates real paint using a dynamic brush that is easily controlled by moue and using simple parameters.
