"Paint.NET is a photo and image editing tool designed for computers
running Microsoft Windows XP or Windows 2000. It serves the digital
imaging community as a free alternative to the standard paint
application included with Windows. It brings powerful features to the
desktop, a myriad of special effects, plug-in extensibility, and layer
manipulation. It enhances the image editing experience for tablet
owners with Windows XP Tablet Ink support. Digital photographers and
artists can enhance their images with features and effects such as
levels adjustment, cross-layer cloning, anti-aliased tools, motion
blur, and red eye removal."