Adobe Photoshop, is a really very good Adobe product and the best till now for Imaging. Its the must software for creating Illustrations Arts and for manipulation of Images and Photos.

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But we observed and tried some more popular Image Editing Apps, and we find that its the easiest way to perform with these. These are some apps for both Windows and Mac for Image Editing alternatives to Photoshop.

Paint.NET

Platform : Windows 7 Only

Paint.Net is a very easy to use program and it has many features. Many special effects are included for enhancing and perfecting your images.

Everything from blurring, sharpening, red-eye removal, distortion, noise, and embossing are included. Also included is our unique 3D Rotate/Zoom effect that makes it very easy to add perspective and tilting.

Download Paint.NET

GIMP

Platform : Unix, Windows and Mac OS X

GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.

Download GIMP

Pixelmator

Platform : Unix, Windows and Mac OS X

Pixelmator, the beautifully designed, easy-to-use, fast and powerful image editor for Mac OS X has everything you need to create, edit and enhance your images.

Download Pixelmator

Splashup

Platform : Web Based

Splashup, formerly Fauxto, is a powerful editing tool and photo manager. With the features professionals use and novices want, it’s easy to use, works in real-time and allows you to edit many images at once.

Visit Splashup Workspace

Inkscape

Platform : Windows and Mac OS X

An Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.

Download Inkscape

Photoshop Express

Platform : Web Based

Adobe Photoshop Express online apps, it takes no time at all to make good photos look great and great photos look amazing—and then show them off via web galleries and favorite sharing sites.

Visit Photoshop Express

Pixel Graphics Editor

Platform : Mac OS X Only

Pixen is an innovative graphics editor for the Mac. It’s designed from top to bottom for pixel artists-people who make low-resolution raster art like the sprites you see in old video games.

Download Pixen Graphics Editor

PhotoFiltre

Platform : Windows Only

PhotoFiltre is a free image editor that makes a great lightweight alternative to Photoshop for users who want something more simple and easy to use.

Download PhotoFiltre

Krita

Platform : Linux,BSD

Krita is a creative application for raster images. Whether you want to Create from scratch or work with existing images, Krita is for you. You can work with photos, scanned images or start for a blank Slate. Krita supports most graphics tablets out of the Box.

Download Krita

Picnik

Platform : Web Based

Picnik is a online Image Editor for you, in your browser.It gives real power of editing photos. Its fast, easy and offers tons of effects.

Visit Picknik Workspace