Paint.NET is free image and photo editing software for computers that run Windows. It features an intuitive and innovative user interface with support for layers, unlimited undo, special effects, and a wide variety of useful and powerful tools. An active and growing online community provides friendly help, tutorials, and plugins.
Changes/fixes since v3.5:
New: For Windows 7, added taskbar progress reporting for long running operations (effects, adjustments, Image->Resize, save, install)
Made some corrections to the French translation
Running setup with /auto will no longer launch Paint.NET when it’s done
Fixed an issue where Paste into New Image would refuse an image on the clipboard, even if regular Paste would take it
Fixed a race condition with Edit->Paste and Image->Resize whereby it would take up 100% CPU and take between 1 minute to 1 hour to finish
Fixed an issues with Copy/Paste where it would leave an extra line of transparent pixels on the left, top, right, and/or bottom edges
Fixed lag with the paintbrush tool that was being seen on some systems
Fixed some issues with the paintbrush and eraser tool being misaligned when zoomed in
Fixed a crash that would happen at (seemingly) random times, such as after drawing with the paintbrush tool, on some systems
Fixed a minor and obscure rendering glitch with the Move Selected Pixels tool
Fixed an issue with glass over Remote Desktop or Windows 7 Virtual PC
Fixed a minor glitch whereby the “Unsaved Changes” confirmation dialog could never finish rendering the image thumbnail if one of the Move tools was active