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听起来也许有点奇怪，但是，页面美化元素对你的网页是很有好处的。想让你的页面更加吸引用户，想让用户对某个部分发生兴趣，设计良好的图标是不可或缺的。这里收集了很多高质量的图标元素，可以加入到你的页面里面，呵呵，不要用于商业用途。
XP iCandy 3.1: 17 个图标，个人用户免费使用。
Vista 控制面板图标
来自 FreeIconsWeb.com 的一套 iMac 图标
文件夹图标50个，适用于 PC 和 MAC
Boxes vista-like : OS by TPDKCasimir: icons are based on the new packaging for Windows Vista. 26 icons for various OS (13 icons in two categories : box with disc and without disc). Free for non-commercial use.
Toolbar Icons by Matt Ball: 用于Mac OS X
Crystal Clear 图标. GNU Lesser General Public License (LGPL)授权方式. 所有图标实际大小为 128px.
Notes Icons
VistaICO Toolbar Icon Pack contains 50 high quality (256×256 pixels) icons; PNG 以及 ICO 格式. 
OpenPhone Pack contains 12 high quality (256×256, 128×128, 16×16, 32×32, 48×48 pixels) icons; PNG and ICO formats. This package includes icons inspired on the new iPhone. Pack Size: 1.38MB.
Mac OS Boxes: 6 realistic looking white boxes (Mac OS only). Free for personal use. Size: 150.10 KB
Flag Button Development Kit: sometimes you have to provide different options or features for different nationalities. Here is a development kit to create such buttons.
Social Bookmark Iconset
iPhone Icon Pack contains 5 high quality (256×256 pixels) icons; PNG and ICO formats. This package includes: iPhone Clown Fishes icon, iPhone Off icon, iPhone Wallpaper Mod icon, iPhone Apple icon and iPhone OS Interface icon.
Adobe CS 3 Icon Pack: 9 256×256 PNG icons based on the design of Adobe CS3’s applications’ boxes.
WebSiteIcons.net
Macromedia Icons Pack
mAqua ChronoSync: free for personal use only.
Dashboard Collection: 12 icons for the Mac OS X Dashboard, inspired by real car dashboards. Size: 250.71 KB.
Danish Royalty Free Icons by Jonas Rask: is an icon set of 32×32 pixel toolbar icons. You can use them in your apps, in your toolbar, on your website. A credit would be appreciated greatly, but it’s not obligatory at all. Package includes ICNS,PNG, TIFF, Mac Icons and Pixadex iContainer versions.
Feedicons is an iconset from Zeus Box Studio. You may use them to give your “subscribe to RSS-feed”-button a fresh look.
104 standard PC keyboard key icons: feel free to to copy, distribute, display, and perform the work entitled “104 Standard PC Keyboard Key’s Icon Set” for both non-commercial and commercial purposes. You are also free to make derivative works.
Globe Icons
Office Stuff Icon Set
Office Icons pack contains 8 office tools icons (carries pencil, cutter, hole punch, mail, paperclip, pen, scissors and stapler ).
Aqua Neue (Graphite): is a brand new set of system replacement icons in Aqua style. Meant to be an improvement to Aqua’s default, users will have no problem switching over to them. 86 icons. Size: 1746.91 KB.
Metal Trash: 2 trash icons for the dock or the desk ( Metal trash empty and full ).
Shopping Chart Icons
Iconshock’s Icon Sets offers 7 icon sets including Consoles Vista icons, Red Hot Chili Icons, Elm Nightmare Street Icons, NBA Web Icons, Disk Jockey Icons, Filming Vista icons and more.
Yoritsuki icons by HYBRIDWORKS: contains 35 icons that are associated with hot springs in Japan. Elaborate, detailed, unique icons drawn in 128×128-pixel format will make your desktop delightful.
Mouse Category Season 02 by denghao: all png files are 128×128 with transparent shadow.
Pixel Press Icons (.dmg, Mac only)
Autumn Breeze Icons: icons for Linux and Windows.
300: 4 icons from the blockbuster film, 300. Size: 105.44 KB.
Pirates of the Caribbean: 4 icons inspired by the Pirates of the Caribbean. Size: 115.47 KB.
Harry Potter and Windows XP Icons
Harry Potter and the Bitten Apple
Ratatouille
Smiles
Smiley Development Kit: a development kit to create excellent smilies.
Friendly Fire pack contains 25 high quality (256×256 pixels) icons; PNG and ICO formats. This package includes: Girl smiley icon, Cocktail smiley icon, Cool smiley icon, Googles smiley icon and more.
