Mac users interested in Snow leopard pixelmator generally download:
Pixelmator is an image editor for Mac OS X that allows you to create, edit, and enhance your images. Interface designed for work with images, layers-based image editing, use over 20 tools for selecting, crop, painting, retouching, typing, measuring, and navigation. Use over 15 color correction tools, use over 50 filters, adjust image size and resolution.
