Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
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.
Todoist 10 for iOS - A completely new Todoist for iOS
Autodesk SketchBook - SketchBook drawing and painting software provides designers, architects, and concept artists the tools to sketch ideas quickly and create beautiful illustrations.
Microsoft To-Do - Task management tool
Clip Studio Paint - The artist's software for drawing and painting.