[hernan7]

Why not use ImageMagick?

I have used it to create thumbnails for a demo website and they looked OK. Does it have any performance/ aliasing/ whatever issues I'm not aware of?

[johngunderman]

ImageMagick is gold for this sort of thing. I'm actually working with it as I type :)

[hkuo]

I've used ImageMagick and it works great. Though I think many average developers who don't tinker with servers would have a harder time picking it up.