Paint.NET is free image and photo editing software for Windows. The interface of Paint.net is easy to use and learn with support for layers and an unlimited undo function, special effects, and a wide variety of useful and powerful tools. It’s active and growing online community (forum has over 16,679 registered members and over 229,478 posts) provides friendly help, tutorials, and great plug-ins. Unlike Adobe Photoshop with is NOT resource hogging, Photo.NET uses very less memory.
Paint.net History - Paint.net was originally created as a Washington State University student project. Paint.NET has evolved from a simple replacement for the Microsoft Paint program, taken on under the mentorship of Microsoft. The project exceeded expectations and has been in development now for 6 years.
PSDPlugin for Photo.NET gives the ability to open .PSD Photoshop files and do some editing on them too. The plug in does not support every feature provided by the file format, but just the ones that relate to functionality within Paint.NET. You can work with layers, load masks, and open a variety of color modes and profiles. Because of the limited integration with the .PSD file, the plugin is best suited for pulling a .PSD file into Paint.Net and converting it to be used in your Paint.NET workflow.