Paint.NET is a free image and photo editing software made for Windows.  It was originally intended to be a replacement for Windows Paint but has grown to become a powerful yet simple photo editing tool.  It has been compared to other photo editing programs such as Adobe Photoshop and GIMP.

Paint.NET features layers, unlimited undo, special effects, and a wide variety of useful and powerful tools.  There is an active online community of users that can provide help,  tutorials and plugins.

So if you’re looking for an easy way to manipulate photos and you don’t want to pay for Photoshop, then Paint.NET might be for you.  There is a free download available from download.com.