VectorScribe - The missing toolbox for Adobe Illustrator.
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.
Fabricating Alternatives - AI-powered card deck to help ideation & brainstorm
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
SnapUp - Wireframe faster / create amazing user interfaces
MyPaint - MyPaint is a fast, distraction-free, and easy painting tool for digital artists.