Windows Icons WebRing
- A webring for sites that offer icons.
- http://www.webring.com/hub?ring=windowsicons

iDev
- A large group of icons available, some unique, grouped by subject.
- http://www.idev.ch/content/view/86/63/

Iconshock
- Windows Vista icons in many colors and shapes, as well as royalty free icons.
- http://www.iconshock.com/index.php/

Zeusbox Studio
- Free icons for Mac, Windows and Linux.
- http://www.zeusboxstudio.com/blog/feedicons-2

IconShoppe
- Royalty free, stock icon sets.
- http://iconshoppe.com/

Icontoaster
- Free icons for Mac OS X, Windows and Linux. Site requires a Mozilla based browser.
- http://icontoaster.com

Hyperflame
- Several colorful sets for Mac and PC.
- http://home.pacific.net.au/~istara/

FamFamFam Icons
- Several large sets of coordinated icons, available for use free of charge under a Creative Commons Attribution license.
- http://www.famfamfam.com/lab/icons/

The Iconfactory
- Icons, wallpaper, and related software for Macintosh and Windows systems. Includes free and commercial products.
- http://www.iconfactory.com/

CoolArchive
- Large selection of icons in .ico and .gif formats, sorted by category.
- http://www.coolarchive.com/icons.php

IconExperience
- Collections for software developers and user interface designers. Offers a free sample collection and technical information.
- http://www.iconexperience.com/

Jeff's Icons
- Free and fee icons for the PC, including sports, television networks and coins.
- http://www.jeffs-icons.com/

Wackypixel Co.
- Icons and desktop pictures for Mac OS X and Windows XP and Vista. Some are free, most fee. Custom design services available.
- http://www.wackypixel.com/

Electric Icon Land
- Free icons distributed from an icon shop. For Macintosh, Linux, and Windows.
- http://www.electriconland.com/

IconPacks
- Icons that can be licensed for use in commercial projects, software applications or websites.
- http://www.iconpacks.com/

iVGI
- Large collection of video game icons, from the Atari 2600 and Commodore 64 to the Xbox, GameCube and PS2. Includes previews.
- http://www.ilk.i12.com/

VisualPharm
- Custom icons for commercial software manufacturers. Some free samples for Windows Vista.
- http://www.visualpharm.com/icons.html

Linux Icons
- Penguin icons in Windows ico, gif and PNG formats.
- http://www.willamowius.de/linux.html

Marg-Art
- Transparent and animated cat cursors and icons, and how-to instructions for using them.
- http://www.marg-art.com/

Gort's Icons
- Icons for the Mac, Windows, Palm, and Amiga, as well as Mac OS X user pictures.
- http://www.forrestwalter.com/icons/index.html

IconAmazons
- A gallery of Mac and Windows icons.
- http://www.bry-backmanor.org/iconamazons/

IconsTree
- Free icons and cursors for the Mac and PC, wallpapers and cursors.
- http://www.iconstree.com/icons.htm

IconArchive
- Large offering of icons for Windows, Mac and Linux, from many authors.
- http://www.iconarchive.com/

B-chan's Corner
- Anime icons and cursors for Windows XP.
- http://ultimatechallenge.i8.com/winxp/

Alternative Icons for KDE
- Original icons based around the new KDE icons. They use a limited palette of 34 colors. Distributed under the GNU Library license.
- http://www.buzzard.org.uk/jonathan/kde-icons.html

Alien Entity
- Offers free downloads of icons for AIM and for the computer desktop, and avatars.
- http://www.entity.cc/

Zapaticons
- A collection of icons that were originally created for the Amiga, converted for Windows, Mac, BeOS, and Atari.
- http://zapatopi.net/icons.html/

IconLibrary
- A collection for Windows, organized in groups. A trial, unregistered version is available.
- http://iconlibrary.com/index.html/

Virtual Horse Graphics
- Horse icons and buttons.
- http://virtualhorses.com/graphics/icons/horseicons.htm

Top Icons
- Some free, some fee icons, for Windows and Mac. Includes cartoons, sports, animals and system.
- http://www.topicons.com/

Jeffrey Zeldman Presents
- Characters and animals for web sites, and for Mac, Windows, or Unix desktops.
- http://zeldman.com/icon.html