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.
KiddoPaint - MS Paint in your browser (with emojis 💃😽🎨)
TwistedBrush Pro Studio - A powerful and unique natural media painting program.
JS Paint - JSPaint is a web-based Microsoft Paint remake
GIMP - GIMP is a multiplatform photo manipulation tool.
GIF Paint - Like MSPaint… for GIFs.