Autodesk SketchBook - SketchBook drawing and painting software provides designers, architects, and concept artists the tools to sketch ideas quickly and create beautiful illustrations.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
MediBang Paint - The official site for MediBang Paint, the free digital painting and manga creation software. You can download the latest version of MediBang Paint here, and get news and tutorials.
GIMP - GIMP is a multiplatform photo manipulation tool.
Artrage - A simple but lovely natural media painting and sketching program.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.