Paintstorm might be a bit more popular than Mtpaint. We know about 1 link to it since March 2021 and only 1 link to Mtpaint. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I use mtPaint; although GIMP is much more popular. Source: about 1 year ago
If she wants to expand and more than just mimic traditional paints there are even more programs she might want to consider, the king of the "generalist" softwares is Photoshop, my personal choice, but there are valid alternatives out there, starting from the free and open source Krita, to cheap but solid programs like Clip Studio Paint (especially good for comics/manga, but it can also do other stuff), Paintstorm... Source: over 2 years ago
Microsoft Paint - Paint (formerly Paintbrush) is a simple, ultra-basic graphics painting program that is included...
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.
Corel Painter - Corel Painter is media painting software.
Clip Studio Paint - The artist's software for drawing and painting.
GIMP - GIMP is a multiplatform photo manipulation tool.
PaintTool SAI - Learn to draw in different ways.