Pinta is a free, Open Source drawing/editing program modeled after Paint.NET. Its goal is to provide users with a simple yet powerful way to draw and manipulate images on Linux, Mac, and Windows.
DreamPlan Home Design Software is a useful home/landscape design software that allows you to visualize garden features, rooms, additions, or an entire home.
Imagine is a free image-animation viewer developed as an alternative to many other free popular viewers such as IrfanView, XnView, or FastStone Image Viewer.
SoftOrbits Digital Photo Suite places you in charge of multiple tools for quick and easy resizing, converting, protecting, correcting, and publishing your digital photos.
Lunacy is a full-fledged sketch editor. Using Lunacy, you can create new designs. It’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 installer is available for download here.