UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
GIMP - GIMP is a multiplatform photo manipulation tool.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project
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.