Online Image Editor - Online editor for images and animated gifs with multiple effects and tools
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Pixelitor - Pixelitor is a cross-platform raster graphics editor written in Java.
Clip Studio Paint - The artist's software for drawing and painting.
RealWorld Photos - RealWorld Photos is an free portable photo editor for Windows.
MyPaint - MyPaint is a fast, distraction-free, and easy painting tool for digital artists.