Paper by WeTransfer - A collection of creative prompts
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.
Milanote - Milanote is a note taking app for creative work.
Autodesk SketchBook - SketchBook drawing and painting software provides designers, architects, and concept artists the tools to sketch ideas quickly and create beautiful illustrations.
Astropad - Astropad is a free form drawing tool designed from the ground up to take advantages of the features offered by an iPad.
Clip Studio Paint - The artist's software for drawing and painting.