[Update] Thanks to DLS reader Kevin for pointing out in the comments that these icons are only for personal use. Pixel Press Icons does however have a page of royalty-free 16x16 icons that can be used anywhere.

One of the quickest way to put a personal stamp on your computer is to use custom icons. For those of us that have become addicted to creating the perfect icon set, it can become a mission to search out the most beautiful icon for some specific application or folder.

One place to find some very high-quality icons is Pixel Press Icons. Their icon sets are offered free of charge for use on websites, in software, or on your personal computer. The icon sets are packaged in Mac-friendly drive image files (DMG file extension), although I'm sure enterprising Windows users can find a way to make use of these icons as well.

In fact, if you've got the expertise to share how to download and install a Mac icon packaged inside a Mac image file, please share it with us in the comments.