Lunacy is a full-fledged Sketch editor. Using Lunacy, you can create new designs. Itâ€™s a perfect tool for prototyping. You can add simple shape elements to your layout (such as drawing an oval, rectangle, line, or adding a bitmap) and drawing, aligning, and joining objects.
GIMP Portable is the full-featured image and photo editor bundled with a PortableApps.com launcher as a portable app so that you can edit your photos and images on the go. The latest stable installer is available for download here.
MediBang Paint Pro is an extremely easy-to-use free digital painting application that includes numerous brushes, backgrounds, textures, and comic book fonts, allowing you to make your ideas come alive.