Clip Studio Paint - The artist's software for drawing and painting.
GIMP - GIMP is a multiplatform photo manipulation tool.
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.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
ibis Paint X - Drawn with + ibisPaint
FireAlpaca - FireAlpaca is the image editor that can be used readily and easily.