While these eye-catching icon sets are distinctly Mac-centric, many of them are filled with stunning pieces that could be easily co-opted for another operating system.
Over at AppStorm, a blog focused on Mac applications, they've compiled 50 great Mac icon sets. The eye candy factor is off the chart, and non-Mac readers will be tempted to snag some of the pickings. LiteIcons is a great freeware solution for installing and managing your Mac's icons, but if you want to use them in Windows or Linux, you'll need to do a little tweaking. Check out web based iConvert to covert a wide variety of icon formats and IcoFX if you're working in Windows.
50 Unusually Awesome Icon Sets for Mac [AppStorm]