the PseudoRoom - Some icons and features of Justin Dauer's work. - http://www.pseudoroom.com/
Icons.cx - Icons for Mac OS X and Classic Mac OS. - http://www.icons.cx/
IconsMacX - Personal icons developed for OS X, all related to movies. Includes a how to section. - http://perso.orange.fr/iconsmacx/
Calle's Custom Icons - Icons include flags, folders, and theatre masks. Provides information about the designer and frequently asked questions. - http://www.multiart.nu/cci/
Warrior Poet - Mac OS X icons include carnivals and sea beasts. Portfolio and details of his graphic design services. - http://www.warriorpoeticons.us/
InterfaceLIFT - Source for high-quality Mac OS X icons. Large archive of 128x128 pixel icons. - http://interfacelift.com/icons-mac/
MindFad - Free original icons. Offers icon and interface design services. - http://mindfad.com/
Colheres - OS X icons, classic icons and desktop pictures for the Mac, from three women in Portugal. - http://homepage.mac.com/rosapomar/colheres/
Stuff for MAC OS X - Several unique sets including industrial, technopop, alcoholiX, Depeche Mode. - http://www.tavallai.com/osx/
Paganlink Software Archive - Shareware and freeware collection of icons made for the Macintosh. - http://www.paganlink.org/downloads/gui/mac-gui.html#icons
Robot Frog - Uniquely styled icons, desktop pictures, and related resources. - http://www.robot-frog.com/
Iconmaniac - Features an archive spanning several years and details on creating an icon. - http://www.iconmaniac.com/