Paint.NET ( Photoshop Killer )
Paint.NET is free image and photo editing software. 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 plug-ins. Version 3.35 has a new Posterize adjustment, Intersect selection mode, dramatically faster selection editing performance (add, subtract, intersect), and some small miscellaneous bug fixes. Free and focused Paint.NET packs in photo-editing tools to crop, rotate, resize images, and adjust colors for some of the most common image formats. The editor supports layers and effects, though red-eye removal is a weak point.
Paint.NET supports common image formats--JPEG, PNG, GIF, TIFF, and others--but not high-resolution RAW files. There are enough basic and intermediate effects and features to keep image-tweakers happy, though the red-eye removal tool is notably weak; those images may require manual attention.
Version 3.35 fixes many old quibbles, including a convenient thumbnail manager for handling multiple image editing, and improved program graphics. 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.