PAINT.NET is one of the best freeware alternative available for expensive Adobe Photoshop. The user interface of this software is brilliant and very easy to understand. It supports all major features of any expensive photo editing software like layers, unlimited undo’s, special effects, and many other powerful tools. Editing multiple images becomes very easy with the tabbed interface as each image is opened in a separate tab. Many special effects are included for enhancing your images. Everything from blurring, sharpening, red-eye removal, distortion, noise, and embossing are included, a unique 3D Rotate/Zoom effect that makes it very easy to add perspective and tilting is also included .
GIMP is a multi-platform photo manipulation tool. GIMP is an acronym for GNU Image Manipulation Program. The GIMP is suitable for a variety of image manipulation tasks, including photo retouching, image composition, and image construction.
It has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.
GIMP is expandable and extensible. It is designed to be augmented with plug-ins and extensions to do just about anything. The advanced scripting interface allows everything from the simplest task to the most complex image manipulation procedures to be easily scripted.
One of The GIMP‘s strengths is its free availability from many sources for many operating systems. Most GNU/Linux distributions include The GIMP as a standard application. The GIMP is also available for other operating systems such as Microsoft Windows™ or Apple’s Mac OS X™ (Darwin). The GIMP is a Free Software application covered by the General Public License ( GPL license). The GPL provides users with the freedom to access and alter the source code that makes up computer programs.
The following list is a short overview of some of the features and capabilities which GIMP offers you:
A full suite of painting tools including brushes, a pencil, an airbrush, cloning, etc.
Tile-based memory management, so image size is limited only by available disk space
Sub-pixel sampling for all paint tools for high-quality anti-aliasing
Full Alpha channel support for working with transparency
Layers and channels
A procedural database for calling internal GIMP functions from external programs, such as Script-Fu
IrfanView is a fast and compact image viewer/converter. It is trying to be simple for beginners and powerful for professionals. Many supported file formats and features. Features include: multi-language support, Thumbnail option, Painting, slideshow, toolbar skins, fast directory browsing, batch conversion/editing, multipage editing, file search, change color depth, scanning, cut/crop, IPTC edit, capturing, lossless JPG operations, effects, ICC support, EXE/SCR creating, many hotkeys, command line options and plugins.
Numerous changes in version 4.23 include: Added History list for Random slideshow; New multipage images menu: Create Multipage PDF; Option to save changes on exit; Options to set start parameters for external editors; New Thumbnail option: Use full file path for sorting (if subfolders loaded).