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.
It started development as an undergraduate college senior design
project mentored by Microsoft, and is currently being maintained by
some of the alumni that originally worked on it. Originally intended as
a free replacement for the Microsoft Paint software that comes with
Windows, it has grown into a powerful yet simple image and photo editor
tool. It has been compared to other digital photo editing software
packages such as Adobe® Photoshop®, Corel® Paint Shop Pro®, Microsoft
Photo Editor, and The GIMP.