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.
The programming language used to create Paint.NET is C#, with a small amount of C++ for installation and shell-integration related functionality.
The source code is available under the terms of the MIT License.