Pixelmaker is an extremely quick image editing application for Leopard. It's similar to Photoshop and GIMP in many aspects, but also has some very unique features that justify the $60 price tag. For starters, Pixelmator is laid out a lot like Photoshop and GIMP. This makes getting started easy if you've used either of these programs before.
Sexy Interface
Pixelmator looks amazing. It's absolutely beautiful. While it doesn't use the traditional Leopard user interface it still fits into the operating system quite nicely.
Most filters have this cord running from the tool to the picture. The physics for this are dead on as you move the window around your screen.
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While this seemed like unnecessary eye candy at first, I later realized it was pretty useful for not loosing track of the dot.

You'll also notice some of the filters are similar to those in Photo Booth. This is because Pixelmator and Photo Booth rely on Core Imagefor many of their effects.
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Pixelmator isn't limited to Core Image filters, however. It does offer quite a few that I haven't seen before.
copied from
Pixelmator: A Great Photoshop Alternative for OS X — Two Free Licenses! - MacTips