Paint.NET is free image editing and photo manipulation software designed to be used on computers that run Windows. It supports layers, unlimited undo, special effects, and a wide variety of useful and powerful tools.
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 MS Paint software that comes with Windows, it has grown into a powerful yet simple tool for photo and image editing.
The programming language used to create Paint.NET is C#, with a small amount of C++ for installation and shell-integration related functionality.
Version 3.5 addresses many performance quibbles and offers some interface tweaks for the Aero-theme users, but fans of the "dancing ants" may not like the gray-overlay changes made to the selection tools. The useful tools under Effects on the menu bar have seen many additions since version 3, including surface blurs, dents, and crystalize.
The new version automatically downloads and installs the program's prerequisites, including the latest Microsoft .Net version and Windows Installer. It will update in the background now, too, so you can continue to use the program until it's ready to restart. Longtime users should notice that the program starts up about 20 percent faster, according to the publisher. Regardless of minor problems, Paint.NET is far more advanced than Microsoft Paint, and given its free price, it's a must-have for anyone needing to fix images.
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