Chris Paveglio has introduces Desktop Blurrifier 1.0 for Mac OS X (10.6 and higher). It’s available for US$5 at the Mac App Store.
Desktop Blurrifier makes your desktop pictures blurry so you can focus on the icons on your Desktop easier, according to Paveglio. Users can adjust the blur and scale of an image and then set it to be the desktop image.
The contrast of a slightly blurred desktop image keeps you focused on work and makes it easier to see icons, Paveglio says. You can also adjust the contrast, saturation, and colorize an image. EPS and PDF vector graphics can be used also.
Desktop Blurrifier supports multiple monitors. There’s a live preview of the desktop image as you change values of your image.