Comment by yiyus

ImageMagick is great, I use it all the time. Photoshop is superb for interactive image editing, but if you need to crop a thousand images, change brightness, add some text on top, and merge them one next to the other, for example, and you need to do this every day, a sciptable tool is essential, and I really appreciate having all the power of Unix instead of a limited environment that requires a huge platform.