GIMPshop

Professional graphic designers and even enthusiasts are familiar with Adobe PhotoShop, the industry-leading image editing software. However, if you don't want to spend about $700 for a single license, then you can make use of the following application. GIMPshop is an open-source image editing software with more or less the same capabilities of PhotoShop, but completely free. It might not be 100% the mentioned program, but it is definitely in the top 5 and you don't have to pay for it.

GIMPshop provides powerful graphics manipulation capabilities bundled in a single package. It features a customizable interface that you can adapt to your project's needs. It also includes a lot of photo enhancement tools and advanced manipulation tools. What is more, if all the built-in tools are not enough for you, there are over 100 plug-ins available, also for free, that you can download to extend GIMPshop functionality.