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.
Fresh Paint - Microsoft's new painting software with more realistic brushes for Windows 10
MyPaint - MyPaint is a fast, distraction-free, and easy painting tool for digital artists.
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
GIMP - GIMP is a multiplatform photo manipulation tool.