Adobe Photoshop is the largest selling image editing in the world. The Photoshop family of products has a number of applications. Adobe Photoshop CS5 and CS5 Extended are professional tools and designed for professional illustrators, graphic artists and photographers.
Adobe makes a scaled down version called Photoshop Elements that is less complex and easier to use. This product is targeted at the amateur photographer and hobbyist. In addition Apple Macintosh makes a product called iPhoto, which is very easy to use but only available for the Macintosh.
There are many free easy to use editors. There is an open source program called Seashore, which is very easy to use but very restrictive compared to the Photoshop products. Photoscape is another easy to use image editing program available as shareware.
Finally there is GIMP, which is a free open source program as good as Photoshop and just as complex.
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