FocalBlade & Color Washer  are two photoshop plugins specifically for Intel Macs that I find very useful.
FocalBlade features a range of automatic, semiautomatic and manual tools for sharpening photos. It is very easy to use as it offers interactive explanations for each feature, incorporates modes for various tasks (including a Novice Mode) and detailed step-by-step [...]

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GraphicConverter is an excellent all-purpose image editing program that can import 190 different graphic-based formats, edit the image, and export it out of 75 file available file formats. The high-end editing tools are perfect for graphic manipulation as well as the ability to use Photoshop-compatible plug-ins. It offers batch-conversion capabilities, a slide show window, and [...]

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